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参数资料
| 型号： | LTC4160EUDC#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/32页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH POWER MANAGER 20-QFN |
| 标准包装： | 91 |
| 系列： | Bat-Track™, PowerPath™ |
| 功能： | 电源管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.35 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN（3x4） |
| 包装： | 管件 |
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LTC4160/LTC4160-1
PIN FUNCTIONS
I BAT =
V PROG
OVGATE (Pin 1): Overvoltage Protection Gate Output.
Connect OVGATE to the gate pin of an external N-channel
MOSFET. The source of the transistor should be connected
to V BUS and the drain should be connected to the product’s
DC input connector. In the absence of an overvoltage con-
dition, this pin is connected to an internal charge pump
capable of creating sufficient overdrive to fully enhance
the MOSFET. If an overvoltage condition is detected, OV-
GATE is brought rapidly to GND to prevent damage to the
LTC4160/LTC4160-1. OVGATE works in conjunction with
OVSENS to provide this protection.
OVSENS (Pin 2): Overvoltage Protection Sense Input.
OVSENS should be connected through a 6.2k resistor to
the input power connector and the drain of an external
N-channel MOSFET. When the voltage on this pin exceeds
V OVCUTOFF, the OVGATE pin will be pulled to GND to dis-
able the MOSFET and protect the LTC4160/LTC4160-1.
The OVSENS pin shunts current during an overvoltage
transient in order to keep the pin voltage at 6V.
VBUSGD (Pin 3): Logic Output. This is an open-drain
output which indicates that V BUS is above V UVLO and
V DUVLO . VBUSGD requires a pull-up resistor and/or LED
to provide indication.
FAULT (Pin 4): Logic Output. This in an open-drain output
which indicates a bad battery fault when the charger is
enabled or a short circuit condition on V BUS when the
bidirectional PowerPath switching regulator is in step-up
mode (On-The-Go). FAULT requires a pull-up resistor
and/or LED to provide indication.
ID (Pin 5): Logic Input. This pin independently enables
the bidirectional switching regulator to step-up the volt-
age on V OUT and provide a 5V output on the V BUS pin for
USB On-The-Go applications. If the host does not power
down V BUS then connect this pin directly to the ID pin of
a USB micro-AB receptacle. Active low. Has an internal
2.5μA pull-up current source.
ENOTG (Pin 6): Logic Input. This pin independently enables
the bidirectional switching regulator to step-up the voltage
on V OUT and provide a 5V output on the V BUS pin for USB
On-The-Go applications. Active high. Has an internal 1.8μA
pull-down current source.
ENCHARGER (Pin 7): Logic Input. This pin enables the
battery charger. Active low. Has an internal 1.8μA pull-
down current source.
PROG (Pin 8): Charge Current Program and Charge Cur-
rent Monitor Pin. Connecting a 1% resistor from PROG to
ground, programs the charge current. If sufficient input
power is available in constant-current mode, this pin servos
to 1V. The voltage on this pin always represents the actual
charge current by using the following formula:
? 1030
R PROG
CHRG (Pin 9): Logic Output. This is an open-drain out-
put that indicates whether the battery is charging or not
charging. CHRG requires a pull-up resistor and/or LED to
provide indication.
IDGATE (Pin 10): Ideal Diode Amplifier Output. This pin
controls the gate of an optional external P-channel MOSFET
used as an ideal diode between V OUT and BAT. The external
ideal diode operates in parallel with the internal ideal diode.
The source of the P-channel MOSFET should be connected
to V OUT and the drain should be connected to BAT. If the
external ideal diode MOSFET is not used, IDGATE should
be left floating.
BAT (Pin 11): Single Cell Li-Ion Battery Pin. Depending on
available V BUS power, a Li-Ion battery on BAT will either
deliver power to V OUT through the ideal diode or be charged
from V OUT via the battery charger.
V OUT (Pin 12): Output Voltage of the Bidirectional Power-
Path Switching Regulator in Step-Down Mode and Input
Voltage of the Battery Charger. The majority of the portable
product should be powered from V OUT . The LTC4160/
LTC4160-1 will partition the available power between the
external load on V OUT and the internal battery charger.
Priority is given to the external load and any extra power
is used to charge the battery. An ideal diode from BAT to
V OUT ensures that V OUT is powered even if the load exceeds
the allotted power from V BUS or if the V BUS power source
is removed. In On-The-Go mode, this pin delivers power
to V BUS via the SW pin. V OUT should be bypassed with a
low impedance multilayer ceramic capacitor.
41601fa
10
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