参数资料
型号: MAX1737EEI+T
厂商: Maxim Integrated Products
文件页数: 8/18页
文件大小: 0K
描述: IC CNTRLR BAT CHARGE 28-QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
功能: 充电管理
电池化学: 锂离子(Li-Ion)
电源电压: 6 V ~ 28 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SSOP(0.154",3.90mm 宽)
供应商设备封装: 28-QSOP
包装: 带卷 (TR)
MAX1737
Stand-Alone Switch-Mode
Lithium-Ion Battery-Charger Controller
Pin Description
8
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
NAME
VL
ISETIN
ISETOUT
THM
REF
GND
BATT
VADJ
CCV
CCS
CCI
CELL
TIMER1
TIMER2
FAULT
FASTCHG
FULLCHG
SHDN
CS
PGND
DLO
VLO
BST
LX
DHI
CSSN
CSSP
DCIN
FUNCTION
Chip Power Supply. Output of the 5.4V linear regulator from DCIN. Bypass VL to GND with a
2.2μF or larger ceramic capacitor.
Input Current Limit Adjust. Use a voltage-divider to set the voltage between 0 and V REF .
See Input Current Regulator section.
Battery Charging Current Adjust. Use a voltage-divider to set the voltage between 0 and V REF .
See C harging Current Regulator section.
Thermistor Input. Connect a thermistor from THM to GND to set a qualification temperature
range. If unused, connect a 10k Ω resistor from THM to ground. See Thermistor section.
4.2V Reference Voltage Output. Bypass REF to GND with a 1μF or larger ceramic capacitor.
Analog Ground
Battery Voltage-Sense Input and Current-Sense Negative Input
Voltage Adjust. Use a voltage-divider to set the VADJ voltage between 0 and V REF to adjust the
battery regulation voltage by ±5%. See Setting the Voltage Limit section.
Voltage Regulation Loop Compensation Point
Input Source Current Regulation Compensation Point
Battery-Current Regulation Loop Compensation Point
Cell-Count Programming Input. See Table 2
Timer 1 Adjustment. Connect a capacitor from TIMER1 to GND to set the prequalification,
full-charge, and top-off times. See Timers section.
Timer 2 Adjustment. Connect a capacitor from TIMER2 to GND to set the fast-charge time. See
Timers section.
Charge Fault Indicator. Open-drain output pulls low when charging terminates abnormally
(Table 1).
Fast-Charge Indicator. Open-drain output pulls low when charging with constant current.
Full-Charge Indicator. Open-drain output pulls low when charging with constant voltage in
full-charge state.
Shutdown Input. Drive SHDN low to disable charging. Connect SHDN to VL for normal
operation.
Battery Current-Sense Positive Input. See Charging Current Regulator section.
Power Ground
Synchronous-Rectifier MOSFET Gate-Drive Output
Synchronous-Rectifier MOSFET Gate-Drive Bias. Bypass VLO to PGND with a 0.1μF capacitor.
High-Side MOSFET Gate Drive Bias. Connect a 0.1μF or greater capacitor from BST and LX.
Power Inductor Switching Node. Connect LX to the high-side MOSFET source.
High-Side MOSFET Gate-Drive Output
Source Current-Sense Negative Input. See Input Current Regulator section.
Source Current-Sense Positive Input. See Input Current Regulator section.
Power-Supply Input. DCIN is the input supply for the VL regulator. Bypass DCIN to GND with a
0.1μF capacitor. Also used for the source undervoltage sensing.
Maxim Integrated
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