参数资料
型号: UCC3957MTR-1G4
厂商: Texas Instruments
文件页数: 5/15页
文件大小: 0K
描述: IC LI-ION PROTECT CIRCUIT 16QSOP
标准包装: 2,500
功能: 过压/欠压保护
电池化学: 锂离子(Li-Ion)
电源电压: 5 V ~ 20 V
工作温度: -20°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-SSOP/QSOP
包装: 带卷 (TR)

Not Recommended for New Designs
UCC3957 1, UCC3957 2, UCC3957 3, UCC3957 4
SLUS236B – JANUARY 1999 – REVISED SEPTEMBER 2002
APPLICATION INFORMATION
overview
The UCC3957 provides complete protection against overdischarge, overcharge and overcurrent for a three-
or four-cell lithium-ion battery pack. It uses a flying capacitor technique to sample the voltage across each
battery cell and compare it to a precision reference. If any cell is in overvoltage or undervoltage, the
internal-state machine takes the appropriate action to prevent further charge or discharge. High-side P-channel
MOSFETs are used to independently control charge and discharge current. Figure 1 shows a three-cell
lithium-ion protector application diagram with the optional charge-enable switch. In this application, the diode
D1 protects the MOSFET Q2 from inductive kick at turn-off.
PACK (+)
Q1
IFR7416
R1
1 M ?
Q3
2N7002
D1
1 A, 50 V
CHARGE
Q2
IFR7416
DISCHARGE
C1
0.1 μ F
1
VDD
DVDD
16
LI – ION
BATTERY
STACK
C5
4.7 μ F
25 V
2
CLCNT
AVDD
15
C2
0.1 μ F
C3
OPTIONAL
3
WU
CDLY2
14
+
+
4
AN1
DCHG 13
5
AN2
CHG
12
+
6
AN3
AN4
11
C4
0.022 μ F
PACK ( – )
RSENSE
0.025 ?
7
8
AN4
BATLO
CDLY1
CHGEN
10
9
S1
CLOSE TO ENABLE CHARGING
Figure 1. Three-Cell Lithium-Ion Protector Application Diagram
www.ti.com
UDG – 98016
5
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UCC3957MTR-2 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
UCC3957MTR-2G4 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
UCC3957MTR-3 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
UCC3957MTR-3G4 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
UCC3957MTR-4 功能描述:电池管理 3-4-Cell Lithium-Ion Protection IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel