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| 型号： | MAX8903DETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/30页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC CHARGER LI+ 2A 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 系列： | Smart Power Selector™ |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.1 V ~ 16 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 包装： | 管件 |
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MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
Typical Operating Characteristics (continued)
(T A = +25°C, unless otherwise noted.)
USB DISCONNECT WITH NO DC
(R SYS = 25 ? )
MAX8903A toc26
USB SUSPEND
MAX8903A toc27
USB RESUME
MAX8903A toc28
V SYS
V USB
3.6V
5V
2V/div
5V/div
V USUS
I USB
0V
475mA
3V
0A
5V/div
500mA/div
V USUS
I USB
3V
0A
C USB
CHARGING
0V
475mA
5V/div
500mA/div
I USB
475mA
500mA/div V SYS
3.7V
2V/div
V SYS
3.6V
3.8V
3.6V
2V/div
I BAT
-330mA
1 44m A
500mA/div I BAT -475mA
0A
500mA/div
I BAT
0A
BATTERY
CHARGER
-475mA
500mA/div
SOFT-START
100 μ s/div
200 μ s/div
200 μ s/div
Pin Description
PIN
1, 2
3, 4
5
6
7
8
9
10
11
12
NAME
PG
DC
DCM
BST
IUSB
DOK
VL
CT
IDC
GND
FUNCTION
Power Ground for Step-Down Low-Side Synchronous n-Channel MOSFET. Both PG pins must be
connected together externally.
DC Power Input. DC is capable of delivering up to 2A to SYS. DC supports both AC adapter and USB
inputs. The DC current limit is set through DCM, IUSB, or IDC depending on the input source used. See
Table 2. Both DC pins must be connected together externally. Connect at least a 4.7μF ceramic capacitor
from DC to PG.
Current-Limit Mode Setting for the DC Power Input. When logic-high, the DC input current limit is set by
the resistance from IDC to GND. When logic-low, the DC input current limit is internally programmed to
500mA or 100mA, as set by the IUSB logic input. There is an internal diode from DCM (anode) to DC
(cathode) as shown in Figure 1.
High-Side MOSFET Driver Supply. Bypass BST to LX with a 0.1μF ceramic capacitor.
USB Current-Limit Set Input. Drive IUSB logic-low to set the USB current limit to 100mA. Drive IUSB logic-
high to set the USB current limit to 500mA.
DC Power-OK Output. Active-low open-drain output pulls low when a valid input is detected at DC. DOK
is still valid when the charger is disabled ( CEN high).
Logic LDO Output. VL is the output of an LDO that powers the MAX8903_ internal circuitry and charges
the BST capacitor. Connect a 1μF ceramic capacitor from VL to GND.
Charge Timer Set Input. A capacitor (C CT ) from CT to GND sets the fast-charge and prequal fault timers.
Connect to GND to disable the timer.
DC Current-Limit Set Input. Connect a resistor (R IDC ) from IDC to GND to program the current limit of the
step-down regulator from 0.5A to 2A when DCM is logic-high.
Ground. GND is the low-noise ground connection for the internal circuitry.
Maxim Integrated
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8903DETI+ | 功能描述:电池管理 Dual AC/USB Powered 1-Cell Li+ Charger 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 |
| MAX8903DETI+T | 功能描述:电池管理 Dual AC/USB Powered 1-Cell Li+ Charger 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 |
| MAX8903EETI+ | 功能描述:电池管理 Dual AC/USB Powered 1-Cell Li+ Charger 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 |
| MAX8903EETI+T | 功能描述:电池管理 Dual AC/USB Powered 1-Cell Li+ Charger 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 |
| MAX8903FETI+ | 功能描述:电池管理 Dual AC/USB Powered 1-Cell Li+ Charger 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 |
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