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参数资料
| 型号： | MAX8922LETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/15页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHARGER SGL 10TDFN |
| 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： | 0 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN EP（3x2） |
| 包装： | 带卷 (TR) |
30V Li+ Linear Battery Charger
with GSM Test Mode in 3mm x 2mm TDFN
CHARGER LOOP DEFAULT IS OFF;
IF EN/SET = LOW UPON POK.
CHARGER LOOP
ACTIVATES AFTER 4ms
POR DEBOUNCE
ASYNCHRONOUS
FROM ANYWHERE
t EN/SET = HIGH > 4ms
STANDBY MODE
CHARGER = OFF
POK = LOW
CHG = HIGH IMPEDANCE
V UVLO < V IN < V OVP AND
V IN > V BAT + 250mV
SHUTDOWN
CHARGER = OFF
POK = HIGH IMPEDANCE
CHG = HIGH IMPEDANCE
ASYNCHRONOUS
FROM ANYWHERE
V IN < V UVLO
OR V IN > V OVP
EN/SET = LOW
V IN < V UVLO
OR V IN > V OVP
OR V BAT + 100mV > V IN
OR V BAT + 100mV > V IN
V BAT < 2.5V
PREQUALIFICATION
PRECHARGE CURRENT
POK = LOW
CHG = LOW
V BAT < 2.2V
V BAT > 2.5V
PULSE 3
MODE DOES NOT HAVE
PRECHARGE STATE
POK = (V OVP > V IN > V UVLO )
AND (V IN - V BAT ) > 250mV
FAST CHARGE
(PULSE PROGRAMMABLE)
100% CHARGER CURRENT
POK = LOW
CHG = LOW
I CHG > I TOP-OFF + HYSTERESIS
I CHG < I TOP-OFF
FULL BATTERY
Figure 2. Charger State Diagram
V BAT = 4.2V
POK = LOW
CHG = HIGH IMPEDANCE
FULL BATTERY CONTINUES
TO REGULATE V BAT TO 4.2V
Power-OK Indicator ( POK )
The MAX8922L contains an open-drain POK output that
goes low when V IN is greater than V UVLO and lower than
V OVP and V IN exceeds the battery voltage by 250mV.
Once charging has started, charging is sustained with
inputs as low as 3.5V, as long as the input voltage
remains above the battery voltage by at least 100mV.
POK status should be maintained even though the
charger is disabled by EN /SET. When V IN > V OVP , POK
is high impedance.
8
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