BQ24703PWRG4

更新时间： 2024-02-01 22:49:45

品牌	Logo	应用领域
德州仪器 - TI		电池控制器
页数	文件大小	规格书
32页	518K
描述
MULTICHEMISTRY BATTERY CHARGER CONTROLLER AND SYSTEM POWER SELECTOR

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BQ24703PWRG4 数据手册

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SLUS553D − MAY 2003 − REVISED JULY 2005

ELECTRICAL CHARACTERISTICS (CONTINUED)

(−40°C ≤ T ≤ 125°C, 7.0 V

≤ VCC ≤ 28 V , all voltages relative to V ) (unless otherwise specified)

Battery Current-Sense Amplifier

PARAMETER

TEST CONDITIONS

MIN

TYP

120

MAX

UNIT

Transconductance gain

175 mA/V

CMRR Common-mode rejection ratio

See Note 1

Common-mode input (SRP, SRN)

voltage range

VCC = SRN, SRP + 2 V

COMP = 1 V,

0.5

2.5

110

ICR

Sink current (COMP)

(SRP − SRN) = 10 mV

SRSET = 2.5 V,

1.5

(SINK)

= 16 V,

(SRP)

Input bias current (SRP), See Note 2

Input bias current accuracy

(SRP − SRN) = 100 mV VCC = 28

µA

(SRP − SRN) = 100 mV, SRSET= 2.5 V,

−3

2.5

)

VCC = 28 V, 0 ≤ T ≤ 125°C

SRP − SRN

Battery current programming voltage

(SRSET)

(SET)

0.65 V ≤ SRSET ≤ 2.5 V, 8 V ≤ SRN ≤ 16 V,

See Note 3

Battery current set gain

V/V

SRSET = 1.25 V, T = 25°C, See Note 4

−5%

−6%

−3%

−4%

Total battery current-sense mid-scale

accuracy

SRSET = 1.25 V, See Note 4

SRSET = 2.5 V, T = 25°C, See Note 4

Total battery current-sense full-scale

accuracy

SRSET = 2.5 V, See Note 4

NOTES: 1. Specified by design. Not production tested.

= I

= (V

/ 50 kΩ) + ((V

− V / 3 kΩ)

(SRN)

(SRP) (SRN)

(SRSET)

(SRP)

example: If (V

= 2.5 V) , (V

− V

= 100 mV) Then I = 83 µA

= I

(SRSET)

(SRP)

(SRP) (SRN)

SRSET

BAT

SENSE

4. Total battery-current set is based on the measured value of (SRP−SRN) = ∆m, and the calculated value of (SRP−SRN) = ∆C, using

(

)

Dm * Dc

SRSET

the measured gain, A . Dc +

, Total accuracy in % +

100, I_(SRP)* I_(SRN)+ 0

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