AC-DC Power Supply Secondary Controller IC

CXA3822M
Description

The CXA3822M is a secondary controller IC used for AC-DC power supply series resonance converter.
(Applications: Power supply circuits)

Features

< 5V, 12V control block >

 5V/12V voltage control circuit
 OTP (Detection of abnormal temperature) function
 LVP/OVP (Detection of abnormal voltage)
 Mode transition timer function

< Common >

 16-pin SOP package
 TSD protection function
 UVLO function

Structure

CMOS silicon monolithic IC

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license
by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating
the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

-1- E09X14

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 CXA3822M

Absolute Maximum Ratings

Item Symbol Rating Unit Remarks

Maximum supply
VCC_12V 24 V VIN5, VIN12
voltage1
Maximum supply
VDD5 7.5 V VDD5
voltage2
12V pin voltage VCCIN –0.3 to +24 V AMPO12, AMPIN12, AMPO5, AMPIN5
TEST, TEMP, xACDC_STBY, xPFCOK,
VDD pin voltage VDDIN –0.3 to +7.5 V
xACDET, MAINON, LATCH5, ACIN_DET
Allowable power *1
Pd mW (See the thermal derating curve.)
dissipation
Operating ambient C
Topt –30 to +125 —
temperature range
Junction temperature Tjmax +150 C —
Storage temperature Tstg –55 to +150 C —

*1 Allowable power dissipation reduction characteristics

1000
Allowable power dissipation [mW]

When mounted on a four-layer board

800
When mounted on a one-layer board
600 578mW

400 334mW

200
60.2˚C 98.1˚C

–20 0 20 40 60 80 100 120 140 160

Operating ambient temperature Ta [˚C]

Glass fabric base epoxy board, 76mm × 114mm, t = 1.6mm

Recommended Operating Conditions

Item Symbol Rating Unit Remarks

Protection function operates outside of VIN12
Supply voltage1 VCC_12V 7.6 to 14.79 V
rating.
Protection function operates outside of VIN5
Supply voltage2 VCC_5V 3.8 to 6.12 V
rating.
Supply voltage3 VDD5 4.0 to 6.0 V VDD5
Operating ambient C
Topt –25 to +85 —
temperature range
Junction temperature Tj –25 to +125 C —

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F r e e D a t a
 CXA3822M

Block Diagram

12V_control circuit 5V_control circuit

AMPO12 3 14 AMPO5

VIN12 6 16 VIN5
VIN12 REG VIN5 REG
AMPIN12 4 13 AMPIN5
BGR_VIN5
GND12 5 15 GND5
Reference GND: GND12 Reference GND: GND12

1 VDD5
12V_NG detection circuit
Reference circuit
VIN12 LVP
LVP BGR_VDD5
UVLO_VDD5
VIN12 OVP
OVP TSD
OSC
Reference GND: GND12 Reference GND: GND12

VDD5

60kΩ
5V_NG detection circuit
xACDC_STBY 12
240kΩ VIN5 LVP
LVP
VDD5
VIN5 OVP
60kΩ OVP
Control logic
xACDET 10
240kΩ
Reference GND: GND12

VDD5
10kΩ
MAIN_ON 9
Temperature detection circuit
VDD5
VDD5
TEMP OTP
10kΩ
2 TEMP
LATCH5 8 OTP
300kΩ

TEMP LVP

LVP 7 TEST

ACIN_DET 11 Reference GND: GND12

Logic GND: GND12

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 CXA3822M

Pin Configuration

VDD5 1 16 VIN5

TEMP 2 15 GND5

AMPO12 3 14 AMPO5

AMPIN12 4 13 AMPIN5
Top View
GND12 5 12 xACDC_STBY

VIN12 6 11 ACIN_DET

TEST 7 10 xACDET

LATCH5 8 9 MAINON

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 CXA3822M

Pin Table

Pin No. Pin name IN/OUT Function

1 VDD5 — VDD power supply output
2 TEMP IN Temperature monitor input for overheat protection
3 AMPO12 OUT 12V control output
4 AMPIN12 IN 12V control input
5 GND12 — 12V control GND, Internal reference GND, Logic GND
6 VIN12 — 12V input
7 TEST — NC
8 LATCH5 OUT Signal for latch stop of 5V output
9 MAINON OUT Power supply main 12V output ON/OFF signal
10 xACDET IN AC/+B detection signal from power supply upstream
11 ACIN_DET OUT AC detection signal
12 xACDC_STBY IN ON/standby switching signal for power supply (12V)
13 AMPIN5 IN 5V control input
14 AMPO5 OUT 5V control output
15 GND5 — GND for 5V control
16 VIN5 — 5V input

Input logic

Input signal L H
Standby mode Operating mode
xACDC_STBY
(12V = OFF) (12V = ON)
xACDET No upstream AC Upstream AC

Output logic

Output signal L H
MAINON Main output ON Main output OFF
ACIN_DET Abnormal (No AC) Normal (AC)
LATCH5 Abnormal (5V off latch) Normal

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 CXA3822M

Pin Description

Pin Standard
Symbol I/O Equivalent circuit Description
No. pin voltage
1 VDD5 — — — VDD power supply input

VDD5

GND to Temperature monitor input for

2 TEMP I
VDD5 2 overheat protection

GND12

VIN12

GND to
3 AMPO12 O 12V control output
VIN12 3

GND12

VIN12

GND to
4 AMPIN12 I 12V control input
VIN12 4

GND12

5 GND12 — — — GND for 12V control

6 VIN12 — — — 12V input
7 TEST — — — NC

VDD5
Signal for latch stop of 5V
8 LATCH5
output

GND to
O
VDD5 8
9
Power supply main 12V output
9 MAINON
ON/OFF signal

GND12

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 CXA3822M

Pin Standard
Symbol I/O Equivalent circuit Description
No. pin voltage

VDD5

GND to AC/+B detection signal from

10 xACDET I
VDD5 power supply upstream
10

GND12

VDD5

GND to
11 ACIN_DET O AC detection signal
VDD5 11

GND12

VDD5

GND to ON/standby switching signal

12 xACDC_STBY I
VDD5 12 for power supply (ACDC)

GND12

VIN5
VDD5

GND to
13 AMPIN5 I 5V control input
VIN5 13

GND5
GND12

VDD5

GND to 14
14 AMPO5 O 5V control output
VIN5 15
16

GND12

15 GND5 — — — GND for 5V control

16 VIN5 — — — 5V input

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 CXA3822M

Electrical Characteristics

Circuit current
(Unless otherwise specified, the conditions are VIN5 = 5.5V, VDD5 = 5.0V, VIN12 = 12V, Ta = 25C)

Item Symbol Conditions Min. Typ. Max. Unit

Power supply: VIN5, VDD5
Standby current ISTBY1 — 0.7 1.0 mA
xACDC_STBY = L (12V = OFF)
Power supply: VIN5, VDD5
Operating current1 ICC1 — 1.7 3.0 mA
xACDC_STBY = H (12V = ON)
Power supply: VIN12
Operating current2 ICC2 — 0.2 0.4 mA
xACDC_STBY = H (12V = ON)

Note) Co indicates capacitance connected to OUT pin.

Logic pin
(Unless otherwise specified, the conditions are VIN5 = 5.5V, VDD5 = 5.0V, VIN12 = 12V, Ta = 25C)

Item Symbol Conditions Min. Typ. Max. Unit

Logic pin
VIH xACDC_STBY, xACDET pin 2.0 — VDD V
Input High voltage
Logic pin
VIL xACDC_STBY, xACDET pin 0 — 0.5 V
Input Low voltage
Logic input xACDC_STB, xACDET pin
IIN1 10 17 25 A
Inflow current1 VIN = 5V
Logic output High VDD –
VOH ACIN_DET, Io = –5mA — VDD V
voltage 0.3
Logic output Low
VOL ACIN_DET, Io = 5mA 0 — 0.3 V
voltage
Output voltage during
Io = 5mA
Low VLI — — 0.3 V
MAINON, LATCH5 pin
(Open drain pin)
Logic output High
ROH ACIN_DET, Io = –5mA 0 15 60 
side on resistance
Logic output Low side
ROL1 ACIN_DET, Io = 5mA 0 15 60 
on resistance
Output on resistance
Io = 5mA
during Low ROL2 0 15 60 
MAINON, LATCH5 pin
(Open drain pin)

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 CXA3822M

5V,12V control block

(Unless otherwise specified, the conditions are VIN5 = 5.5V, VDD5 = 5.0V, VIN12 = 12V, Ta = 25C)

Item Symbol Conditions Min. Typ. Max. Unit

Voltage between VIN5
5V control voltage V5 and GND5 5.47 5.53 5.59 V
VDD5 = 4 to 6V
Voltage between VIN5
5V input LVP detection
LVP5 and GND5 3.8 4.0 4.2 V
voltage
VDD5 = 4 to 6V
Voltage between VIN5
5V input OVP detection
OVP5 and GND5 5.88 6.0 6.12 V
voltage
VDD5 = 4 to 6V
AMPO5 output voltage
VLI_5V Io = 5mA — — 0.3 V
during Low
Voltage between VIN12
12V control voltage V12 and GND12 11.88 12 12.12 V
VDD5 = 4 to 6V
Voltage between VIN12
12V input LVP detection
LVP12 and GND12 7.6 8 8.4 V
voltage
VDD5 = 4 to 6V
Voltage between VIN12
12V input OVP detection
OVP12 and GND12 14.21 14.5 14.79 V
voltage
VDD5 = 4 to 6V
AMPO12 output voltage
VLI_12V Io = 5mA — — 0.3 V
during Low
Temperature abnormality OTP = TEMP/VDD
OTP 0.68 0.692 0.704 —
detection ratio *1 VDD5 = 4 to 6V
TEMP pin LVP detection LTP — 0.05 0.1 0.2 V
VDD5 operation start
ACT_VDD VDD5 = L  H 3.1 3.3 3.5 V
voltage
VDD5 operation stop
UVLO_VDD VDD5 = H  L 2.5 2.7 2.9 V
voltage
HYS_VDD =
Hysteresis width HYS_VDD 0.2 0.5 1.0 V
ACT_VDD – UVLO_VDD

*1 Detects temperature abnormality when TEMP/VDD5  0.692.

Example of calculation: Detects temperature abnormality when TEMP/VDD5 = TEMP/5V  0.692,
that is TEMP  0.692  5 = 3.46V.

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 CXA3822M

Description of Operation

1. 5V Control Circuit and 12V Control Circuit

Fig.1 shows the equivalent circuit for the 5V and 12V control block.

When the VIN5 voltage exceeds 5.5V, the internal AMP output switches and current is drawn from AMPO5.
This enables control of VIN5 at 5.5V in combination with the primary side via a photocoupler connected to the
AMPO5 pin.

The 12V control operates in like manner; current is drawn from the AMPO12 pin when the VIN12 voltage
exceeds 12V.
This enables control of VIN12 at 12V in combination with the primary side via a photocoupler connected to
AMPO12.

5V and 12V control block

5V control circuit
AMPO5
22

VIN5
5VSB 24

22.5kΩ
VIN5 REG
AMPIN5
21
1V
5kΩ
5VSB REG

12V control circuit

AMPO12
3

VIN12
VIN12 6

55kΩ
VIN12 REG
AMPIN12
4
1V
5kΩ
12V REG

Fig.1. 5V and 12V Control Equivalent Circuit

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 CXA3822M

2. 5V and 12V Control Abnormality Detection

Fig.2 shows the equivalent circuits for the 5V and 12V control voltage abnormality detection block.

When an abnormal 5V and 12V control REG voltage occurs during operation, the device detects the
abnormality and transitions to the “latch stop” state. (For the states following abnormality detection, see the
state transition diagram on page 19.)
The abnormality detection voltages are as follows.

5V control abnormality detection------- LVP: 4V or lower

OVP: 6V or higher

12V control abnormality detection------ LVP: 8V or lower

OVP: 14.5V or higher

5V and 12V control voltage abnormality detection block

VIN5
5VSB 24
5V_NG detection circuit

VIN5 LVP
(4V detection)
LVP

VIN5 OVP
(6V detection)
OVP

Control logic

VIN12
VIN12 6
12V_NG detection circuit

VIN12 LVP
(8V detection)
LVP

VIN12 OVP
(14.5V detection)
OVP

Fig.2. 5V and 12V Control Abnormality Detection Equivalent Circuit

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 CXA3822M

3. Temperature Abnormality Detection Circuit

Fig.3 shows the equivalent circuit for the temperature abnormality detection block.

As shown in the figure, a thermistor connected between the TEMP and VDD5 pins enables detection of
abnormal board temperatures. A temperature error is detected when the voltage ratio of the TEMP and VDD5
pins is 0.692 or more (TEMP/VDD5  0.692).
A temperature abnormality is defined when the abnormal temperature continues for 1.1 seconds.
When a temperature abnormality is detected, the device transitions to the “abnormality detection” or “latch
stop” state.
(For the states following abnormality detection, see the state transition diagram on page 14.)
In addition, as a pin protection function, the same abnormality is detected when the voltage of the TEMP pins
falls to 0.1V or lower.

Temperature abnormality detection block

VDD5
Temperature detection circuit

VDD5 Thermistor
TEMP OTP
(70 ˚C detection) TEMP
2
OTP

Control logic 300kΩ

TEMP LVP
(0.1V detection)

LVP

Fig.3. Temperature Abnormality Detection Equivalent Circuit

- 12 -

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 CXA3822M

5. State Transition Diagram

Fig.4 shows a state transition diagram (main state).
Transitions between states occur in response to input signals from external sources or the condition of the 5V
and 12V outputs.

Input signal defined time

Input signal Defined time

xACDC_STBT 2.2ms × 5 times
xACDET 4.4µs × 5 times
TEMP_OTP 144ms × 8 times
TEMP_LTP 141µs × 5 times
Initialization ANY
12VIN_OVP 35µs × 5 times
MAIN_ON = H SYS_RST = H (∗1) MAIN_ON = ∗
ACIN_DET = L ACIN_DET = ∗ 12VIN_LVP 35µs × 5 times
(Non-synchronous reset) LATCH5 = ∗
LATCH5 = H 5VIN_OVP 35µs × 5 times
5VIN_LVP 35µs × 5 times
OVP5 VIN5
SYS_RST = L (∗1) SYS_RST Immediately
& 110ms elapsed [xACDET = L] & 110ms elapsed

[VIN5 LVP5]
or [OVP5 VIN5]
Standby or [TEMP LTP] AC recovery 2 5V latch stop
[VIN5 LVP5]
or [OTP TEMP] 550ms
MAIN_ON = H MAIN_ON = H or [OVP5 VIN5] MAIN_ON = H
elapsed
ACIN_DET = H ACIN_DET = L ACIN_DET = L
LATCH5 = H LATCH5 = H LATCH5 = L

xACDC_STBY = H
xACDC_STBY = L
55ms elapsed

AC recovery 1
12V start
MAIN_ON = H Within dotted line:
MAIN_ON = L OVP12 VIN12 ACIN_DET = L OVP5 VIN5 T1 count enabled
ACIN_DET = H LATCH5 = H OVP12 VIN12
LATCH5 = H [VIN5 LVP5]
or [OVP5 VIN5]

[xACDET = L] [xACDET = H] T1 count-up

(550ms elapsed)
550ms elapsed
12V latch stop
AC off OVP5 VIN5
MAIN_ON = H
OVP12 VIN12
MAIN_ON = H ACIN_DET = L
[44ms elapsed with xACDET = L] ACIN_DET = L LATCH5 = H
LATCH5 = H

[VIN12 LVP12]
55ms elapsed or [OVP12 VIN12]
Normal operation
Error detection
[VIN12 LVP12]
MAIN_ON = L or [OVP12 VIN12] MAIN_ON = L
ACIN_DET = H ACIN_DET = L
LATCH5 = H LATCH5 = H
xACDET = L

[VIN5 LVP5] or [OVP5 VIN5]

[TEMP LTP5] or [OTP TEMP]

Fig.4. State Transition Diagram

Input Signal Descriptions

Input signal
No. Signal description
name
Reset signal based on logic power supply (VDD5 pin)
*1 SYS_RST
High: Reset (VDD5  2.7V), Low: Reset canceled (VDD5  3.3V)

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 CXA3822M

AC Off Timing Chart

When AC input stops while in the “standby” or “12V start” state, the device transitions to the “AC off” state after
a minimum of 44ms has elapsed.
The conditions for a transition from the “standby” or “12V start” state to the “AC off” state are as follows:
Conditions for transition to “AC off”: xACDET = Low for 44ms duration
When the AC input returns within 44ms, no transition to the “AC off” state occurs and the current state is
maintained.

A timing chart for the transition from “standby” to “AC off” is shown below.

Transition from "standby" or "12V start" to “AC Off”

AC off

AC input

44ms 44ms

Device xACDET
input signals

MAIN_ON
Device ACIN_DET = H → L
output signals due to transition to AC off state
ACIN_DET
[xACDET = L for 44ms duration]
→ Transition to AC off state

Main state Standby or 12V start AC off

A timing chart for the transition from “normal operation” to “AC off” is shown below.
When AC input stops while in a state other than “standby” or “12V start,” the transition to the “AC off” state
occurs the moment the xACDET pin goes Low, regardless of whether or not 44ms have elapsed.

Transition from “Normal Operation” to “AC Off”

AC off
AC input

Device
xACDET
input signals

MAIN_ON

Device
output signals ACIN_DET = H → L
due to transition to AC off state
ACIN_DET

[xACDET = L]
→ Transition to AC off state

Main state Normal operation AC off

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 CXA3822M

Start Timing Chart

Fig.5 shows a timing chart for the start of operation.
The device is in the “initialization” state until 110ms have elapsed after the rising edge of VIN5 and VDD5
exceeds 3.3V.
In the “initialization” state, 5V LVP detection, temperature detection, and AC off detection are all disabled as
the device waits for 5V supply to start. After this, it transitions to the “standby” state and waits for the 12V start
instruction (xACDC_STBY) from the system. Abnormal voltage detection, temperature detection, and AC off
detection are enabled from the “standby” state onward.
When the 12V start instruction is received, the device enters the “12V start”, 12V abnormal voltage detection
is disabled for a maximum of 550ms. After that, if tha the device enters the “normal operation” state 12V
abnormal voltage detection is enabled.

AC input

VIN12

VDD5 UVLO canceled

(VDD5 ≥ 3.3V)

VIN5 12V start instruction

from system

xACDC_STBY

Device input signals

xACDET
Transition to 12V start state
when xACDC_STBY = H
MAIN_ON = H → L
MAIN_ON
ACIN_DET = L → H
ACIN_DET due to transition to standby
Device output signals

LATCH5
2.2ms × 5 times 55ms
550ms timer start
110ms Max. 550ms

Main state Initialization Standby 12V start Normal operation

5V_LVP Disabled Enabled Enabled Enabled

5V_OVP Enabled Enabled Enabled Enabled

12V_LVP Disabled Disabled Disabled Enabled

Protection functions 12V_OVP Disabled Disabled Enabled Enabled

xACDET Enabled Enabled Enabled Enabled

(AC on/off)

Disabled Enabled Enabled Enabled

TEMP OTP LTP

Fig.5. Start Timing Chart

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 CXA3822M

Stop Timing Chart 1

Fig.6 shows a timing chart for the transition from “normal operation” to “latch stop”.
When a 12V stop instruction (xACDC_STBY = L) is received from the system during normal operation, the
device transitions to the “standby” approximately 11ms later.
In the “standby” state 12V LVP and OVP detection are disabled.
When AC input stops while in “standby”, input from the primary side causes the xACDET pin to change from
High to Low, and the device enters the “AC off” state 44ms later. When in the “AC off” state, 5V LVP detection
is disabled.
With no AC input, the device enters the ANY state (reset condition) when 5V input drops and VDD  2.7V.

AC off
AC input

VIN12

VIN5 12V stop instruction VDD = 2.7V

from system
Transition to ANY state when VDD ≤ 2.7V
All protection functions disabled (reset condition)
xACDC_STBY

2.2ms × 5 times
Device input signals Input from primary
side due to AC off
xACDET = H → L
xACDET

Transition to standby state

when xACDC_STBY = L
MAIN_ON MAIN_ON = L → H
ACIN_DET = H → L
due to AC off
Device output signals ACIN_DET
44ms

LATCH5

Main state Normal operation Standby AC off Initialization

5V_LVP Enabled Enabled Disabled Disabled

5V_OVP Enabled Enabled Enabled Enabled

12V_LVP Enabled Disabled Disabled Disabled

12V_OVP Enabled Disabled Enabled Disabled

Protection functions
xACDET Enabled Enabled Enabled Enabled
(AC on/off)

TEMP OTP LTP Enabled Enabled Disabled Disabled

Fig.6. Stop Timing Chart 1

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 CXA3822M

Stop Timing Chart 2

Fig.7 shows a timing chart for the transition from “AC off” to “stop” in the “normal operation” state.
When AC input stops while in “normal operation”, input from the primary side causes the xACDET pin to
change from High to Low, and the device enters the “AC off” state. When in the “AC off” state, 5V LVP detection
is disabled.
With no AC input, the device enters the ANY state (reset condition) when 5V input drops and VDD  2.7V.

AC off
AC input

VIN12

Transition to ANY state when VDD ≤ 2.7V

All protection functions disabled (reset condition)
VIN5
VDD = 2.7V

xACDC_STBY

Input from primary

Device input signals side due to AC off
xACDET = H → L
xACDET

MAIN_ON = L → H
due to AC off
MAIN_ON
ACIN_DET = H → L
ACIN_DET due to AC off
Device output signals

LATCH5

Main state Normal operation AC off Initialization

5V_LVP Enabled Disabled Disabled

5V_OVP Enabled Enabled Enabled

12V_LVP Enabled Disabled Disabled

12V_OVP Enabled Enabled Disabled

Protection functions
xACDET Enabled Enabled Enabled
(AC on/off)

TEMP OTP LTP Enabled Disabled Disabled

Fig.7. Stop Timing Chart 2

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 CXA3822M

Emergency Stop Timing Chart 1

Fig.8 shows a timing chart for a temperature abnormality during “normal operation”.
When a temperature abnormality occurs while in the “normal operation” state, the device transitions to the
“error detection” state, then 55ms later to “12V latch stop” and 550ms later to “5V latch stop”.

12V off at
LATCH12 = L
VIN12

5V off at
LATCH5 = L
VIN5

xACDC_STBY

Device input signals

xACDET
MAIN_ON = L → H
at transition to 12V latch stop state
MAIN_ON

ACIN_DET = H → L
at transition to error detection state
ACIN_DET
Device output signals

LATCH5 = H → L
LATCH5 at transition to 5V latch stop state

550 ms and 55 ms
timer start
550ms
Temperature error (1.1s elapsed)
55ms

Main state Normal operation Error detection 12V latch stop 5V latch stop

5V_LVP Enabled Enabled Enabled Disabled

5V_OVP Enabled Enabled Enabled Disabled

12V_LVP Enabled Enabled Disabled Disabled

Enabled Enabled Disabled Disabled

Protection functions 12V_OVP
xACDET Enabled Disabled Disabled Disabled
(AC on/off)

TEMP OTP LTP Enabled Disabled Disabled Disabled

Fig.8. Temperature Abnormality during 12V Operation

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 CXA3822M

Emergency Stop Timing Chart 2

Fig.9 shows a timing chart when detecting 12V voltage abnormality during “normal operation”.
When 12V voltage abnormality occurs while in the “normal operation” state, the device transitions to the “12V
latch stop” state, then 550ms later to “5V latch stop”.

12V off at
VIN12 LATCH12 = L

5V off at
LATCH5 = L
VIN5

xACDC_STBY
Device input signals

xACDET

MAIN_ON = L → H
at transition to 12V latch stop state
MAIN_ON

ACIN_DET = H → L
at transition to 12V latch stop state
ACIN_DET
Device output signals

LATCH5 = H → L
at transition to 5V latch stop state
LATCH5

550ms timer start

550ms
12V error voltage detection

Main state Normal operation 12V latch stop 5V latch stop

5V_LVP Enabled Enabled Disabled

5V_OVP Enabled Enabled Disabled

12V_LVP Enabled Disabled Disabled

12V_OVP Enabled Disabled Disabled

Protection functions
xACDET
Enabled Disabled Disabled
(AC on/off)

TEMP OTP LTP Enabled Disabled Disabled

Fig.9. 12V Voltage Abnormality during 12V Operation

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 CXA3822M

Emergency Stop Timing Chart 3

Fig.10 shows a timing chart when detecting 5V voltage abnormality during “normal operation”.
When 5V voltage abnormality occurs while in the “normal operation” state, the device transitions to the “5V
latch stop” state.

12V off at
VIN12 LATCH12 = L

5V off at
VIN5 LATCH5 = L

xACDC_STBY
Device input signals

xACDET
MAIN_ON = L → H
at transition to 5V latch stop state
MAIN_ON

ACIN_DET = H → L
at transition to 5V latch stop state
ACIN_DET
Device output signals

LATCH5 = H → L
at transition to 5V latch stop state
LATCH5

5V error voltage detection

Main state Normal operation 5V latch stop

5V_LVP Enabled Disabled

5V_OVP Enabled Disabled

12V_LVP Enabled Disabled

Protection functions 12V_OVP Enabled Disabled

xACDET
Enabled Disabled
(AC on/off)

TEMP OTP LTP Enabled Disabled

Fig.10. 5V Voltage Abnormality during 12V Operation

- 20 -

Free Datasheet http://www.datasheet4u.com/

 CXA3822M

Emergency Stop Timing Chart 4

Fig.11 shows a timing chart when detecting 5V voltage abnormality or temperature abnormality during
“standby”.
When 5V voltage abnormality or temperature abnormality occurs while in the “standby” state, the device
transitions to the “5V latch stop” state.

5V off at
VIN5 LATCH5 = L

xACDC_STBY

Device input signals

xACDET

MAIN_ON

ACIN_DET = H → L
at transition to 5V latch stop state
ACIN_DET
Device output signals

LATCH5 = H → L
at transition to 5V latch stop state
LATCH5

5V error voltage detection

Main state Standby 5V latch stop

5V_LVP Enabled Disabled

5V_OVP Enabled Disabled

12V_LVP Disabled Disabled

12V_OVP Disabled Disabled

Protection functions
xACDET
Enabled Disabled
(AC on/off)
TEMP OTP LTP Enabled Disabled

Fig.11. 5V Voltage Abnormality or Temperature Abnormality during Standby

- 21 -

Free Datasheet http://www.datasheet4u.com/

 CXA3822M

AC Return Timing Chart 1

Fig.162 shows a timing chart for the period from AC off to return during “normal operation”.
When primary side AC input stops while in the “normal operation” state, the xACDET pin, which is the
secondary side input, goes Low and the device transitions to the “AC off” state. (See page 15 for details.)
When AC input subsequently returns, the device transitions to the “AC return 1” state for 55ms, then to the “AC
return 2” state for 550ms, and finally enters the “standby” state. If an AC off condition is detected while in an
“AC return” state, the device again transitions to the “AC off” state.

AC return
AC input

VIN12

VIN5
VIN5 drop due
to AC off

xACDC_STBY Input change due to AC off

Device input signals xACDET = L → H

xACDET Input change due to AC return

xACDET = L → H

MAIN_ON = H → L
due to transition to 12V start state
MAIN_ON MAIN_ON = L → H
due to transition to AC off state

ACIN_DET = L → H
Device output signals ACIN_DET = H → L due to transition to standby state
ACIN_DET due to transition to AC off state

LATCH5

55ms 550ms 2.2ms × 5 times 550ms

Main state Normal operation AC off AC return 1 AC return 2 Standby 12V start Normal operation

5V_LVP Enabled Disabled Disabled Enabled Enabled Enabled Enabled

5V_OVP Enabled Enabled Enabled Enabled Enabled Enabled Enabled

12V_LVP Enabled Disabled Disabled Disabled Disabled Disabled Enabled

12V_OVP Enabled Enabled Enabled Disabled Disabled Enabled Enabled

Protection functions
xACDET
Enabled Enabled Enabled Enabled Enabled Enabled Enabled
(AC on/off)

TEMP OTP LTP Enabled Disabled Disabled Disabled Enabled Enabled Enabled

Fig.12. AC Off to Return during 12V Normal Operation

- 22 -

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 CXA3822M

AC Return Timing Chart 2

Fig.13 shows a timing chart for the period from AC off to return during “standby”.
When primary side AC input stops while in the “standby” state, the xACDET pin, which is the secondary side
input, goes Low and the device transitions to the “AC off” state. (See page 15 for details.)
When AC input subsequently returns, the device transitions to the “AC return 1” state for 55ms, then to the “AC
return 2” state for 550ms, and finally enters the “standby” state. If an AC off condition is detected while in an
“AC return” state, the device again transitions to the “AC off” state.

AC return
AC input

VIN5

VIN5 drop due

to AC off
xACDC_STBY
Input change due to AC off
Device input signals xACDET = L → H

xACDET Input change due to AC return

xACDET = L → H

MAIN_ON

ACIN_DET = H → L ACIN_DET = L → H
due to transition to AC off state due to transition to standby state
Device output signals ACIN_DET
44ms

LATCH5

55ms 550ms

Main state Standby AC off AC return 1 AC return 2 Standby

5V_LVP Enabled Disabled Disabled Enabled Enabled

5V_OVP Enabled Enabled Enabled Enabled Enabled

12V_LVP Enabled Disabled Disabled Disabled Disabled

12V_OVP Enabled Enabled Enabled Disabled Disabled

Protection functions
xACDET
Enabled Enabled Enabled Enabled Enabled
(AC on/off)

TEMP OTP LTP Enabled Disabled Disabled Disabled Enabled

Fig.13. AC Off to Return during Standby

- 23 -

Free Datasheet http://www.datasheet4u.com/

 CXA3822M

Application Circuit

12V_control circuit 5V_control circuit AMPO5

AMPO12
3 14
VIN12 VIN5
VIN12 6 16 5VSB
VIN12 REG VIN5 REG
AMPIN12
4 13
AMPIN5
GND12 BGR_VIN5
5 GND5
15
Reference GND : GND12 Reference GND:GND12 5VSB REG

1
12V_NG detection circuit VDD5 2.2µF
VIN12 LVP Reference circuit
LVP BGR_VDD5
UVLO_VDD5
VIN12 OVP
OVP TSD
OSC
Reference GND : GND12 Reference GND : GND12

VDD5

60kΩ 5V_NG detection circuit

xACDC_STBY
ACDC_STBY 12
VDD5 240kΩ VIN5 LVP
LVP
VDD5
VIN5 OVP
60kΩ Control logic OVP
xACDET
AC_DETOUT 10
240kΩ
Reference GND : GND12

VDD5
ON/OFF 10kΩ
(MAIN_ON) MAIN_ON
9
Temperature detection circuit
VDD5 Thermistor
VDD5
TEMP OTP
5VSB Latch 10kΩ TEMP
LATCH5 2
8 OTP
300kΩ

TEMP LVP
TEST
LVP 7

ACIN_DET Reference GND : GND12

ACIN_DET 11
Logic GND:GND12

Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.

- 24 -

Free Datasheet http://www.datasheet4u.com/

 CXA3822M

Package Outline

(Unit: mm)

16PIN SOP (PLASTIC)

+ 0.4 + 0.4
9.9 – 0.1 1.85 – 0.15

16 9
0.15

+ 0.2
0.1 – 0.05

5.3 – 0.1
+ 0.3

7.9 ± 0.4

6.9
1 8

0.5 ± 0.2
+ 0.1
0.45 ± 0.1 1.27 0.2 – 0.05

0.24 M

PACKAGE STRUCTURE
PACKAGE MATERIAL EPOXY RESIN
SONY CODE SOP-16P-L01
LEAD TREATMENT SOLDER PLATING
EIAJ CODE SOP016-P-0300
LEAD MATERIAL COPPER ALLOY
JEDEC CODE
PACKAGE MASS 0.2g

LEAD PLATING SPECIFICATIONS

ITEM SPEC.
LEAD MATERIAL COPPER ALLOY
SOLDER COMPOSITION Sn-Bi Bi:1-4wt%
PLATING THICKNESS 5-18µm

- 25 - Sony Corporation

Free Datasheet http://www.datasheet4u.com/