HT4936S

Mobile power management scheme

circuit Product Overview

◆ load inserted automatically start boost, remove the load off automatically

HT4936S monolithic frame is a new mobile power management chip, sleep;

the use of advanced technology common charging and discharging port, and ◆ four light indication manner, a more accurate indication of battery charge, while

synchronous rectification, fewer external components, excellent Includes a low battery alert function; ◆ apple provided having a D +, D-

performance, can form a good 1A-in / 1A-out 4LEDs mobile power . dividing resistors disposed port

DPDN, comprising a port disposed NTC, safe temperature control

main feature
system can be driven directly ◆ hand LED lamp drive current 50mA ◆
◆ 1A Built maximum linear charging mode, charging current is externally
1MHZ fixed switching frequency; ◆ battery overcharge, over-discharge
Transfer;
protection; ◆ 4KV ESD; ◆ SOP16 package;
◆ trickle / constant-current / constant-voltage three-charge, 4.20V / 4.35V may

Election, support 0V battery;

◆ built-in rechargeable automatically reduce the charging current according to temperature, 130

Degrees began to decline, the minimum can be reduced to 0; ◆

boost synchronous rectification circuit using a maximum efficiency of more than

90%, low heat generation, a fixed 5.1V output, no external typical application

resistor; ◆ ◆ various mobile power backup power lithium

◆ boost output current 1A (BTP = 3.6V); battery charger and battery indicator ◆

◆ have constant power output, a complete over-current, short circuit

Protection, over-temperature thermal shutdown automatically stops the boosting;

A typical application

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 HT4936S
Mobile power management scheme

Pin definitions

SOP16 Pin name Pin Number Function Description

VPROG 1 Select lithium (float 4.2V, 4.35V is shorted to ground)

NTC 2 NTC resistor (this feature is not required when the pin receiving DPDN)
1 VPROG BTP
led 3 Hand lamps

2
NTC
IPROG DPDN 4 Pull-down side (can be driven DP, DN setting resistor)

3 AGND L4 5 Power indicator 4

LED

4 DPDN PGND
L3 6 Battery indicator 3

L2 7 Power indicator 2
5 L4 LX

L1 8 Battery indicator 1
L3 VCOM
KEY 9 Function switch

VOUT 10
76 L2 VOUT
Boost output sampling

8 L1 KEY VCOM
910,111,213,141,516
11 Input / output terminal

LX 12 Boost inductor end

PGND 13 Power to

AGND 14 Analog ground

IPROG 15 Adjusting a charging current terminal (short to ground when the charging current 1A)

BTP 16 Battery terminal

A circuit block diagram showing an internal configuration

IPROG

Power-on detection
NTC 1.2K

Other
LED functions Charge
VPROG
KEY and discharge control

Driving charge

The 5.8V BTP

L1
control logic
L2 OVP

VOUT
L3 Discharge VCOM
L4 lamp
EA
5.1V

OCP
Boost driver
LX
DPDN
Boost control

AGND PGND

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 HT4936S
Mobile power management scheme

Typical parameters

(Unless otherwise specified, all parameters are measured at room temperature to give, to the GND potential and the potential 0)

symbol characteristic Test Conditions unit Min Typ Max

System parameters

VIN Input voltage range V 4.5 5 6

Vbat battery voltage V 2.8 4.35

Charging parameters

VIN From low to high Vin> BAT mV 100

VIN Down prison

Measurement
VIN High to Low Vin> BAT mV 30

Vfloat1 Float threshold voltage (4.2 / 4.35 Pin floating) V 4.158 4.20 4.242

Vfloat2 Float threshold voltage (4.2 / 4.35 Pin to ground) V 4.30 4.35 4.40

Ibat BAT Current intrusion Vcc = 3.5V , Vbat = 4.2V uA ± 0.5 ± 5

VTRKL Juan constant flow VBAT From low to high V 2.8

VTRHYS Trickle charge voltage hysteresis mV 100

VUV Vcc Undervoltage lockout threshold Vcc From low to high V 3.7

VUVHYS Vcc Undervoltage lockout hysteresis mV 200

VRECHG Re-charge threshold voltage V 4.1

Vprog1 When trickle PROG Voltage V 0.1

Vprog2 Large current PROG Voltage V 1

FLED Charging time led Flashing frequency Hz 1

Discharge parameters

Vo System output voltage boost V 4.95 5.10 5.25

VOVP Output overvoltage protection V 5.8

VOVP_DIS V 5.4

VUVLO Boost undervoltage protection BAT High to low V 2.8

VUVLO_R Boost voltage recovery BAT From low to high V 3.2

Vout = 5.5V , No
IBAT1 mA 0.2
switching
IBAT2 Vout = 4.5V , switching mA 1

FOSC working frequency MHz 1

Iout Output current BAT = 3.6V, Vout> 4.8V V 1.0

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 HT4936S
Mobile power management scheme

Iauto_off Automatic shutdown of the load current BAT = 3.6V Cout = 22uF mA 50

Ibtp Quiescent Current BTP = 3.6V uA 15 40

OTP Over-temperature protection degC 150

OTP_HYS Sluggish degC 30

Charging Plug load is automatically released, may be released by a switch

management module functions and parameters 6. The switching frequency of 1MHZ, use of smaller inductance

1. The internal reference, when 4.20 / 4.35V pin floating, fully charged 7. Start the boost automatically detected load is greater than 10uA standby

voltage of 4.20 V, when the ground, fully charged voltage of 4.35V current, when the output load current is less than 50mA delay 8 seconds

2. maximum charging current up to 1A (PROG when shorted to ground), automatically enter standby mode may be started by the boost switch

requires less than the charge current of 1A, the PROG pin to the resistor 8. If the discharge process when the temperature reaches 150 degrees,

Rch, Ich = 1200 / (Rch + 1200) (A) the thermal protection turns off the output automatically goes to standby.

3. The battery voltage is below 2.8V having a precharge function

(current = Ich * 10%) Put through charging

4. Support for 0V battery charge 1. Support put through charging process, i.e., an external charger while

The three-step charge: trickle, a large current, constant voltage charging, the charging the mobile phone, but also mobile power charging. If the mobile

battery may be filled to ensure phone and then plug the charger plug the power supply first, the priority

6. When the charging current decreases with increasing temperature, 130 phone is fully charged; if the first mobile power plug adapter and then plug

℃ begins to decrease when the temperature reaches 150 degrees, the the phone, the mobile power full priority

charging current may be reduced to 0 2. Mobile power step process, resulting in the output of a cycle 2 seconds,

the charge detection signal of the pulse width 4mS; when there is no charger

Boost module is inserted in 4mS pulse, the output voltage is reduced to 4.7V, the outside is

1. Synchronous rectification step, the maximum conversion efficiency not inserted is determined charger. When the charger is inserted in 4mS

of over 90%, the output voltage is fixed 5.1V pulse, the output voltage is greater than 4.7V, the charger determines

2.Vbat> 3.6V, the output voltage is not less than 4.8V with a carrier to inserted, the system automatically enters charge while discharge state.

provide an output capacity of more than 1A.

3. After the output current begins to drop the maximum voltage, 3. If you remove the charger, then automatically start boost

over-current point decreases with the decrease of the battery voltage, high current equipment 2S 4mS 4mS
more compatible 2S
5.1V

4. After the output voltage of the overvoltage protection greater than 5.8V, 4.7V

when the output voltage drops to 5.4V, automatic recovery

Boost break detection Charging
charger into
The over-current protection and short circuit protection, by

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 HT4936S
Mobile power management scheme

jobs Built-in battery status

L1 L2 L3 L4
Discharge lamp mode (4.2V)

1. The charging indicator lamp current charge Happy form a four, to define the BAT<3.2V 闪烁
提示 灭 灭 灭
indicator values ​into constant light amount; 3.2≤BAT<3.45V 亮 灭 灭 灭
放电 模 3.45≤BAT<3.65V 亮 亮 灭 灭
2. The discharge lamp lit four-way indicates the current charge, the indicator is
式 3.65≤BAT<3.80V 亮 亮 亮 灭
higher than the defined capacity value is extinguished; 3.80≤BAT 亮亮亮亮
3.65≤BAT 浪涌 浪涌 浪涌 浪涌
3. If the battery voltage is below 3.2V discharge, the flicker L1, the voltage
3.65≤BAT<3.80V 亮 浪涌 浪涌 浪涌
drops below 2.8V off; the battery voltage reaches a low to high 充电 模
3.80≤BAT<4.00V 亮 亮 浪涌 浪涌
式
3.2V before, inserted or push switch load L1 flashes eight seconds, but will 4.00≤BAT<4.22V 亮 亮 亮 浪涌

4.22≤BAT 亮 亮 亮 亮
not start the boost.
待机
- 灭灭灭灭
Hand lamp control function 模式

工作 内置电池状态 （4.3
1. Double-click function can turn on flashlight constant light, hand lamp can be L1 L2 L3 L4
模式 5V）
turned off again to double-click;
BAT<3.2V 闪烁
提示 灭 灭 灭
2. driven white light, no current limiting resistor, the maximum output current of
3.2≤BAT<3.60V 亮 灭 灭 灭
50mA; 放电 模 3.60≤BAT<3.80V 亮 亮 灭 灭
式 3.80≤BAT<3.95V 亮 亮 亮 灭
3.95≤BAT 亮亮亮亮
NTC 3.80≤BAT 浪涌 浪涌 浪涌 浪涌
3.80≤BAT<3.95V 亮 浪涌 浪涌 浪涌
1.NTC the battery may be controlled apparatus capable of operating temperature range; 充电 模
3.95≤BAT<4.15V 亮 亮 浪涌 浪涌
式
2. due to the battery temperature by a thermistor, the NTC pin voltage is higher 4.15≤BAT<4.35V 亮 亮 亮 浪涌

than 80% Vcom, that temperature over the operating range, to stop charging or
4.35≤BAT 亮 亮 亮 亮

待机
boosting, when the pin is re NTC when less than 77% Vcom recovery ; - 灭灭灭灭
模式

(注意上表中电压值，指的是充电或者放电过程中，芯片 BTP和AGND的
NTC pin 3. When the voltage is less than 45% Vcom, that temperature over the
电压)

operating range, to stop charging or boosting, than when the NTC pin again

return to work only 48% Vcom;

PCB LAYOUT 参考
4. Take Suitable NTC element can be controlled to give the desired

temperature range. When the NTC function is not required, please contact

DPDN NTC pin, otherwise the system can not work stable

Discharge lamp status table

C1,C2 要紧靠芯片 2mm以内，并且到芯片管脚的

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 HT4936S
移动电源管理方案

连线尽量短；为防止 L1 的热量影响芯片，L1 可稍 远点在 5-10m CMOS 电路由于受静电放电影响而引起的损 坏：

m左右，用粗线连接.

1.操作人员要通过放静电腕带接地；

静电防护措施 2.生产设备外壳必须接地；

CMOS 电路为静电敏感器件，在生产、运输过 程中需采取下 3.装配过程中使用的工具必须接地；

面的预防措施，可以有效防止 4.必须采用半导体包装或抗静电材料包装或运 输。

封装信息

SOP16 封装外观图

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 HT4936S
移动电源管理方案

器件标识与订购信息

器件标识与订购信息

封装形式 芯片表面 采购器件名 称 包装 最小包装 数量

HOTCHIP 公司 LOGO
标识 形式
XXXXXX

产品批次
HT4936S 产品型号
SOP-16 HT4936S HT4936S-C0 Panel mounting 3000PCS
Pb-free

Important Notice

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Examples of typical applications, its usefulness does not guarantee specific mass production.

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◆ Without any of the information described herein for other purposes copy or copies of the Company's license are published strictly prohibited.

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Equipment, security systems, gas equipment, or any apparatus installed in airplanes or other means of transport.

◆ Although the company tried to improve product quality and reliability, but the product of the failure or malfunction inevitable. Therefore, the use of the product the customer must be

Careful safety design, including redundancy, fire protection design, fail-safe to prevent any accidents, fires, or damage.

◆ Silan, I will be dedicated to provide customers with better products.

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