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LP3910 датащи(PDF) 5 Page - Texas Instruments

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номер детали LP3910
подробное описание детали  Power Management IC for Hard-Drive-Based Portable Media Players
PDF  72 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

LP3910 датащи(HTML) 5 Page - Texas Instruments

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LP3910
www.ti.com
SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015
6 Pin Configuration and Functions
NJV Package
48-Pin WQFN
Top View
Pin Functions
PIN
I/O
TYPE(1)
DESCRIPTION
NO.
NAME
Battery temperature sense pin. This pin is normally connected to the thermistor pin of
1
TS
I
A
the battery cell.
2
VBATT1
O
A
Positive battery terminal. This pin must be externally shorted to VBATT2 and VBATT3
3
AGND
—
G
Analog ground
4
VREFH
O
A
Connection to bypass capacitor for internal high reference
5
LDO2EN
I
D
Digital input to enable/disable LDO2
6
VLDO2
O
A
LDO2 output
7
VIN1
I
PWR
Power input to LDO1 and LDO2. VIN1 pin must be externally shorted to the VDD pins.
8
VLDO1
O
A
LDO1 output
9
POWERACK
I
D
Digital power acknowledgement input (see Power-On, Power-Off Sequencing)
A 4.64-k
Ω resistor must be connected between this pin and GND. A fraction of the
10
ISENSE
I
A
charge current flows through this resistor to enable the ADC to measure the charge
current.
11
ADC2
I
A
Channel 2 input to ADC
12
ADC1
I
A
Channel 1 input to ADC
Open
13
IRQB
O
Open drain active low interrupt request
Drain
Open
14
NRST
O
Open drain active low reset during standby
Drain
This output indicates that a valid charger supply source (USB adapter) has been
15
CHG
O
D
detected, and the device is charging. (Red LED)
Battery Status output indicator - off during constant current (CC), 50% duty cycle during
16
STAT
O
D
constant voltage (CV), 100% duty cycle with a fully charged Li-ion battery (Green LED)
17
BUCK1EN
I
D
Digital input to enable/disable BUCK1
18
VFB1
I
A
Buck1 Feedback input terminal
19
BCKGND1
—
G
Buck1 Ground
20
VBUCK1
O
A
Buck1 Output
(1)
A: Analog; D: Digital: G: Ground; PWR: Power
Copyright © 2006–2015, Texas Instruments Incorporated
Submit Documentation Feedback
5
Product Folder Links: LP3910



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