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参数资料
| 型号： | LTC4160EUDC#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| 封装： | 3 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-20 |
| 文件页数： | 2/32页 |
| 文件大小： | 422K |
| 代理商： | LTC4160EUDC#TRPBF |
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LTC4160/LTC4160-1
10
41601fa
PIN FUNCTIONS
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 VBUSandthedrainshouldbeconnectedtotheproduct’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
VOVCUTOFF, 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 VBUS is above VUVLO and
VDUVLO. 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 VBUS 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 VOUT and provide a 5V output on the VBUS pin for
USB On-The-Go applications. If the host does not power
down VBUS then connect this pin directly to the ID pin of
a USB micro-AB receptacle. Active low. Has an internal
2.5A pull-up current source.
ENOTG(Pin6):LogicInput.Thispinindependentlyenables
thebidirectionalswitchingregulatortostep-upthevoltage
on VOUT and provide a 5V output on the VBUS pin for USB
On-The-Goapplications.Activehigh.Hasaninternal1.8A
pull-down current source.
ENCHARGER (Pin 7): Logic Input. This pin enables the
battery charger. Active low. Has an internal 1.8A 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
powerisavailableinconstant-currentmode,thispinservos
to 1V. The voltage on this pin always represents the actual
charge current by using the following formula:
I
V
R
BAT
PROG
=
1030
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
controlsthegateofanoptionalexternalP-channelMOSFET
used as an ideal diode between VOUT and BAT. The external
idealdiodeoperatesinparallelwiththeinternalidealdiode.
ThesourceoftheP-channelMOSFETshouldbeconnected
to VOUT 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 VBUS power, a Li-Ion battery on BAT will either
deliverpowertoVOUTthroughtheidealdiodeorbecharged
from VOUT via the battery charger.
VOUT (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 VOUT. The LTC4160/
LTC4160-1 will partition the available power between the
external load on VOUT 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
VOUTensuresthatVOUTispoweredeveniftheloadexceeds
the allotted power from VBUS or if the VBUS power source
is removed. In On-The-Go mode, this pin delivers power
to VBUS via the SW pin. VOUT should be bypassed with a
low impedance multilayer ceramic capacitor.
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