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参数资料
| 型号： | MAX1757EAI+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | Stand-Alone, Switch-Mode Li+ Battery Charger with Internal 14V Switch |
| 中文描述： | BATTERY CHARGE CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | 5.30 MM, 0.65 MM PITCH, SSOP-28 |
| 文件页数： | 2/17页 |
| 文件大小： | 218K |
| 代理商： | MAX1757EAI+T |
MAX1757
Stand-Alone, Switch-Mode
Li+ Battery Charger with Internal 14V Switch
10
______________________________________________________________________________________
STATE
ENTRY CONDITIONS
STATE CONDITIONS
Reset
From initial power on
or
From done state if battery voltage < recharge voltage
threshold
or
VDCIN - VBATT < dropout threshold
or
VBATT > battery overvoltage threshold
Timers reset, charging current = 0,
FASTCHG = high, FULLCHG = high,
FAULT = high
Prequalification
From reset state if input power, reference, and internal
bias are within limits
Battery voltage
≤ undervoltage threshold,
charging current = (fast-charge current / 10),
timeout = 7.5min typ (CTIMER1 = 1nF),
FASTCHG = low, FULLCHG = high,
FAULT = high
Fast Charge
(Constant Current)
From prequalification state if battery voltage >
undervoltage threshold
Undervoltage threshold
≤ battery voltage
≤ battery regulation voltage,
charging current = charge current limit,
timeout = 90min typ (CTIMER2 = 1nF),
FASTCHG = low, FULLCHG = high,
FAULT = high
Full Charge
(Constant Voltage)
From fast-charge state if battery voltage = battery
regulation voltage
Battery voltage = battery regulation
voltage,
charging current
≤ 330mA,
timeout = 90min typ (CTIMER1 = 1nF),
FASTCHG = high, FULLCHG = low,
FAULT = high
Top-Off
(Constant Voltage)
From full-charge state if full-charge timer expires
or
If charging current
≤ 330mA
Battery voltage = battery regulation voltage,
charging current
≤ 330mA
timeout = 45min typ
(CTIMER1 = 1nF), FASTCHG = high,
FULLCHG = high, FAULT = high
Done
From top-off state if top-off timer expires
Recharge voltage threshold
≤ battery,
voltage
≤ voltage limit, charging current = 0,
FASTCHG = high, FULLCHG = high,
FAULT = high
Over/Undertemperature
From fast-charge state or full-charge state if battery
temperature is outside limits
Charge current = 0, timers suspended,
FASTCHG = no change,
FULLCHG = no change,
FAULT = no change
Fault
From reset state if battery temperature
≥ maximum
battery temperature
or
From prequalification state if prequalification timer expires
or
From fast-charge state if fast-charge timer expires
Charging current = 0, FASTCHG = high,
FULLCHG = high, FAULT = low
Table 1. Charging State Table
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