Datasheet > HT7Q1520

HT7Q1520

更新时间： 2024-03-03 10:09:42

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		电池
页数	文件大小	规格书
19页	1538K
描述
3 to 8 Cell Analog Front End for Li-Battery Protection

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中文翻译

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HT7Q1520 数据手册

HT7Q1520

3 to 8 Cell Analog Front End

for Li-Battery Protection

Features

General Description

• V_INInput Range from 7.5V to 36V

The HT7Q1520 is a high voltage analog-front-end IC

for 3 to 8 cell Li-ion rechargeable battery protection.

It consists of an accumulative cell voltage monitor

and a high accuracy voltage regulator. The device is

designed to monitor an accumulative voltage from 1

to N and outputs the divide-by-N voltage to the analog

multiplexer with a ±0.5% divided ratio accuracy.

The anti-reverse current switch is implemented to

prevent a backﬂow current even if V_OUTis higher than

V_BATn. Each divided accumulative cell voltage can

be observed sequentially on pin VBATn which will

benefit MCUs with a lower number of ADCs. There

are 3 control bits, B0, B1 and B2, to select which

terminal voltage outputs with a maximum 100Hz

scanning frequency when C_OUT=2.2nF. The enable

pin, EN_S, is used to close all switches and the output

voltage is pulled down by an internal 1MΩ resistor. An

integrated regulator provides a 5V supply to the MCU

with a 30mA driving current capability and which has

±1% precision. The voltage regulator is always active

even if the EN_S pin is cleared to a logic low level.

• Accumulative Cell Voltage Monitor: 8-to-1 Analog

Multiplexer with divided ratio accuracy: 1/n ± 0.5%

• Reverse-current prevention switching scan

frequency of 100Hz

• Requires fewer MCU A/D Converters (ADCs)

• 5V/30mA internal Voltage Regulator with ±1%

accuracy

• Operating Temperature Range: -40^oC to +85^oC

• Package Type: 16-pin NSOP

Applications

• Electric power tools

• Handheld vacuum cleaners

Typical Application Circuit

P+

QP1

QP2

C+

ZD1

39V

R11

C+

R10

VIN

R12

4.7μF

QN1

CHG_CTR

R13

C-

R18

R20

VBAT8

VBAT7

VBAT6

VBAT5

VBAT4

VBAT3

VBAT2

VBAT1

51Ω

VB8

VB7

VB6

R16

51Ω

R21

R19

51Ω

V_REG

P-

51Ω

R22

R27

VDD

1OUT

VB5

VB4

R14

R15

1IN-

ICHG

IDSG

QN2

R23

DSG_CTR

1IN+

2IN+

2IN-

HT7Q1520

51Ω

HT92632

R24

R17

2OUT

VSS

R25

51Ω

VB3

VB2

VB1

R26

51Ω

V_REG

VDD

V_REG

VREG

VOUT

51Ω

4.7μF

GND

VOUT

ICHG

IDSG

MCU

V_OUT

V_OUT=(V_BATn)/n

EN_S

CHG_CTR

DSG_CTR

2.2nF

EN_S

GND

Note: 1. If less than 8 serial batteries are used, connect the unused VBATn to the highest voltage potential. Do not

leave any VBATn pin ﬂoating to prevent damage to the device.

2. The bold lines indicate that these connections need to be as short as possible.

3. VIN pin should not be ﬂoating to prevent abnormal operations.

Rev. 1.40

November 19, 2021

12 3 4 5 6 7...19

中文翻译

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