PD7500

Pulse-Width-Modulation Control Circuits

Description
The PD7500 is a voltage mode pulse width modulation switching regulator control circuit designed primarily for power supply
control.
The PD7500 consists of a reference voltage circuit, two error amplifies, an on-chip adjustable oscillator, a dead-time
control(DTC) comparator, a pulse-steering control flip-flop, and an output control circuit. The precision of voltage reference
(VREF) is improved up to ±1% through trimming and this provides a better output voltage regulation. The PD7500 provides for
push pull or single-ended output operation, which can be selected through the output control.
The PD7500 is available in standard packages of DIP-16 and SOIC-16.

Feature Application
 Stable 5V Reference Voltage Trimmed to ±1%
 SMPS
Accuracy
 Back Light Inverter
 Uncommitted output TR for 200mA sink or Source
 Charger
current
 Single-End or push-Pull Operation Selected by
Output Control
 Internal Circuitry Prohibits Double Pulse at Either
Output
 Complete PWM Control Circuit with Variable Duty
Cycle
 On-Chip Oscillator with Master or Slave Operation

Figure 1. Package Types of PD7500

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Pin Configuration
M Package P Package
(SOIC-16) (DIP-16)

1IN+ 1 16 2IN+ 1IN+ 1 16 2IN+

1IN- 2 15 2IN- 1IN- 2 15 2IN-

Feedback 3 14 Ref Feedback 3 14 Ref

DTC 13 Output Ctrl DTC 4 13 Output Ctrl

4
CT 5 12 VCC CT 5 12 VCC

RT 6 11 C2 RT 6 11 C2

GND 7 10 E2 GND 7 10 E2

C1 8 9 E1 C1 8 9 E1

Figure 2. Pin Configuration of PD7500 (Top View)

Output Function Control Table

Signal for Output Control Output Function

VI=GND Single-ended or parallel output

VI=VREF Normal push-pull operation

Functional Block Diagram

Output Ctrl
6 13 8 C1
RT
5 Oscillator Pulse-Steering
CT
Flip-Flop Q1
Dead-Time Control
- Comparator 9
D E1
4 C2
DTC + >CK 11
0.12V
- Q2
Error Amplifier 1 + 10
E2
1IN+ 1 + PWM
2 - Comparator
1IN-
12
VCC
16 14
2IN+ + Reference
Regulator REF
15 -
2IN- 0.7mA 7 GND

3
FEEDBACK

Figure 3. Functional Block Diagram of PD7500

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Absolute maximum rating (Note 1)

Parameter Symbol Value Unit

Supply Voltage(Note 2) VCC 40 V

Amplifier Input Voltage VI -0.3 to VCC+0.3 V

Collector Output Voltage VO 40 V

Collector Output Current IO 250 mA

M Package 73
Package Thermal Impedance (Note 3) RθJA ℃/W
P Package 67

Lead Temperature 1.6mm from case for

260 ℃
10 seconds

Storage Temperature Range TSTG -65 to 150 ℃

ESD rating (Machine Model) 200 V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings"for extended periods
may affect device reliability.
Note 2: All voltage values are with respect to the network ground terminal.
Note 3: Maximum power dissipation is a function of TJ(max), RθJA and TA. The maximum allowable power dissipation at any
allowable ambient temperature is PD = ( TJ(max) - TA )/RθJA. Operating at the absolute maximum TJ of 150℃ can affect
reliability.

Recommended Operating Conditions

Parameter Symbol Min Typ Max Unit

Supply Voltage VCC 7 15 36 V

Collector Output Voltage VC1,VC2 30 36 V

Collector Output Current

IC1,IC2 200 mA
(Each Transistor)

Amplifier Input Voltage VI 0.3 VCC-2 V

Current Into Feedback Terminal IFB 0.3 mA

Reference Output Current IREF 10 mA

Timing Capacitor CT 0.00047 0.001 10 μF

Timing Resistor RT 1.8 30 500 KΩ

Oscillator Frequency fosc 1.0 40 200 KHz

PWM Input Voltage(Pin3,4,and 13) 0.3 5.3 V

Operating Free-Air Temperature TA -40 85 ℃

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Electrical Characteristics
TA=25℃,VCC=20V,f=10KHz unless otherwise noted
Parameter Symbol Conditions Min. Typ. Max. Unit

Reference Section
IREF=1mA 4.75 5.0 5.25 V
Output Reference Voltage VREF
IREF=1mA,TA=-40 to 85℃ 4.7 5.0 5.2 V

Line Regulation RLINE VCC=7V to 36V 2 25 mV

Load Regulation RLOAD IREF=1mA to 10mA 1 15 mV

Short-Circuit Output Current ISC VREF=0V 10 35 50 mA

Oscillator Section
CT=0.001μF,RT=30 KΩ 40

CT=0.01μF,RT=12 KΩ 9.2 10 10.8

Oscillator Frequency fosc KHz
CT=0.01μF,RT=12 KΩ,
9.0 12
TA=-40 to 85℃

CT=0.01μF,RT=12 KΩ,
Frequency Change with Temperature △f/△T 2 %
TA=-40 to 85℃

Dead-Time Control Section

Input Bias Current IBIAS VCC=15V,V4=0 to 5.25V -2 -10 μA

VCC=15V,V4=0V,
Maximum Duty Cycle D(MAX) 45 %
Vpin13=VREF

Zero Duty Cycle 3 3.3

Input Threshold Voltage VITH V
Maximum Duty Cycle 0

Error-Amplifier Section
Input Offset Voltage VIO Vpin3=2.5V 2 10 mV

Input Offset Current IIO Vpin3=2.5V 25 250 nA

Input Bias Current IBIAS Vpin3=2.5V 0.2 1 μA

Common-Mode Input Voltage Range VCM VCC=7V to 36V -0.3 VCC-2 V

Open-Loop Voltage Gain GVO VO=0.5V to 3.5V 70 95 dB

Unity-Gain Bandwidth BW 650 KHz

Common-Mode Rejection Ratio CMRR 65 80 dB

VID=-15mV to -5V,
Output Sink Current (Feedback) ISINK -0.3 -0.7 mA
Vpin3=0.7V

VID=15mV to 5V
Output Soure Current(Feedback) ISOURCE 2 mA
Vpin3=3.5V

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Electrical Characteristics(Continued)

Parameter Symbol Conditions Min. Typ. Max. Unit

PWM Comparator Section

Input Threshold Voltage VITH Zeao duty Cycle 4 4.5 V

Input Sink Current ISINK Vpin3=0.7V -0.3 -0.7 mA

Output Section

Common
VCE(SAT) VE=0V,IC=200mA 1.1 1.3
Emitter
Output Saturation
V
Voltage
Emitter VCC=15V
VCC(SAT) 1.5 2.5
Follower IE=-200mA

Collector Off-State Current IC(OFF) VCE=36V,VCC=36V 2 100 μA

Emitter Off-State Current IE(OFF) VCC=VC=36V,VE=0 -100 μA

Total Device
Supply Current ICC Vpin6=VREF,VCC=15V 6 10 mA

Output Switching Characteristics

Common Emitter
Rise Time tR 100 200 ns
Common Collector

Common Emitter
Fall Time tF 25 100 ns
Common Collector

Naming Rule

PD 7500 M 16

Prisemi Device
16：16 Lead
Package:
7500 Series M:SOIC-16
P:DIP-16

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Parameter Measurement information

VCC=20V

150Ω 150Ω
VCC
4 8 4W 4W
Test DTC C1 Output 1
Inputs 3 9
Feedback E1
12KΩ 6
RT C2 11
Output 2
5 CT E2 10
0.01μF 1
1IN+
2 1IN-
16 2IN+
15 2IN-

13 Output Ctrl REF 14

GND
50KΩ
7

Test Circuit

Voltage VCC
at C1
0V
Voltage VCC
at C2
0V

Voltage
at CT

Threshold Voltage
DTC

0V

FEEDBACK Threshold Voltage

0.7V
0%
Duty Cycle 0% MAX

Voltage Waveforms
Figure 4. Operational Test Circuit and Waveforms

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Parameter Measurement information(Continued)

+ Amplifier Under Test

VI
- FEEDBACK

Vref - Other Amplifier

Figure 5. Error Amplifier Characteristics

20V

68Ω 4W

tf tf
Each Output Output
Circuit 90% 90%

CL=15pF
(See Note A)

10% 10%

Note A:CL includes probe and jig capacitance

Figure 6. Common-Emitter Configuration

20V
Each Output
Circuit 90% 90%

Output 10% 10%

CL=15pF 68Ω 4W
tf tf
(See Note A)

Note A: CL includes probe and jig capacitance.

Figure 7. Emitter-Follower Configuration

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Typical Performance Characteristics

VCC=20V,
TA=25℃

0.001μF
10K
0.01μF

0.1μF

1K
1K 10K 100K 1M
RT-Timing Resistance(Ω)
Figure 8. Oscillator Frequency vs. RT and CT

100
VCC=20V,
△VO=3V
80
TA=25℃

60

40

20

0
1 100 10K 1M
Frequency (Hz)
Figure 9. Error Amplifier Small-Signal Voltage Gain vs. Frequency

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Typical Applications

(VO=5V, IO=1A)
(VI=10V to 40V)
KSA1010 1mH 2A
VI (+) VO
47

150 0.1μ 1M

5.1K
12 11 8 3 2
VCC C2 C1 Feed 1IN-
14
Back REF +
5.1K 50μ
15
2IN- 10V
PD7500 1 5.1K
1IN+
16
2IN+
Output
50μ +
DTC GND E1 Control E2 RT CT 150
4 7 9 13 10 6 5 10V

47K 0.001μ

GND

0.1
VI (-)

Figure 10.Pulse Width Modulated Step-Down Converter

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Product dimension(SOIC-16)

Unit:mm(inch)

1.350(0.053)
1.750(0.069) 1.250(0.049)
0.300(0.013) 7° 1.650(0.065)
0.510(0.020) A
20:1
B 0.250(0.010)
0.400(0.016)
1.270(0.050)
9.800(0.386)
10.200(0.402)
0°
8°
1.270(0.050)

R0.200(0.008)
BSC

R0.200(0.008)

0.200(0.008)
5.800(0.228) 0.050(0.002) 0.250(0.010)
6.240(0.246) 0.250(0.010)
0.170(0.007)
0.250(0.010)

C-C
50:1
3.800(0.150)
4.040(0.159) B
8° 20:1
9.5°
1.000(0.039)

C 0.200(0.008)
SΦ1.000(0.039)
3° Depth 0.200(0.008)
7° 8°
A C
8° 0.400(0.016)×45°

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Product dimension (DIP-16)
Unit:mm(inch)

0.700(0.028)
3.710(0.146) 7.320(0.288)
4.310(0.170) 7.920(0.312)
6° 6° 5°
1.524(0.060)TYP
3.200(0.126)
4° 3.600(0.142)
4°

Φ3.000(0.118)
Depth
0.050(0.002)
0.360(0.014) 2.540(0.100) 0.510(0.020)MIN 0.150(0.006)
0.560(0.022) TYP 0.204(0.008)
3.000(0.118) 0.360(0.014)
3.600(0.142) 8.200(0.323)
9.400(0.370)

6.200(0.244)
6.600(0.260)

18.800(0.740)
19.200(0.756)

R0.750(0.030)

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IMPORTANT NOTICE
and are registered trademarks of Prisemi Electronics Co., Ltd (Prisemi) ,Prisemi
reserves the right to make changes without further notice to any products herein. Prisemi makes
no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does Prisemi assume any liability arising out of the application or use of any
product or circuit, and specifically disclaims any and all liability, including without limitation
special, consequential or incidental damages. “Typical” parameters which may be provided in
Prisemi data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. Prisemi does not
convey any license under its patent rights nor the rights of others. The products listed in this
document are designed to be used with ordinary electronic equipment or devices, Should you
intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical
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devices), please be sure to consult with our sales representative in advance.

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is a registered trademark of Prisemi Electronics.
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