SI9731DQ VISHAY [Vishay Siliconix], SI9731DQ Datasheet - Page 4

• Manufacturer Part Number: SI9731DQ
• Description: UP Controlled Battery Charger For 1-Cell Li-ion or 1-Cell to 3-Cell NiCd/NiMH Batteries
• Manufacturer: VISHAY [Vishay Siliconix]

Si9731
Vishay Siliconix
PIN CONFIGURATION
www.vishay.com
4
ORDERING INFORMATION
PIN DESCRIPTION
Pin Number
8, 10
11
12
13
14
15
16
1
2
3
4
5
6
7
9
Part Number
Si9731DQ
Si9731DB
Eval Kit
CHARGERPOWER_ONIN Logic input for CHARGERPOWER_ON output
CHARGERPOWER_ONIN
CHARGERPRESENTIN
CHARGERPOWER_ON
TRICKLECHARGEEN
CHARGERPRESENT
CHARGERPRESENTIN
MAINCHARGEEN
TRICKLECHARGEEN
TRICKLE_V
V
4.1 V_TAP
MAINCHARGEEN
CVMODE
ON/OFF
CHARGER
Name
V
V
GND
N/C
BAT+
REF
V
CVMODE
CHARGER
ON/OFF
BAT
(N/C)
Logic input for CHARGERPRESENT output
External charger
Master shutdown pin. Taking ON/OFF low shuts down the charger and quiescent current drops
to under 1 µA
Taking this pin high disables trickle (slow) charging
A logic high enables the error amplifier to linearly drive the gate of MOSFET Q1 when
MAINCHARGEREN is high.
An external PWM signal at MAINCHARGEREN pin controls the ON/OFF duty cycle of the Fast
Charge MOSFET, Q1.
Do not connect external circuitry to this pin. Circuitry internal to the IC is connected to this pin.
Internal 1.30 V precision bandgap reference voltage. Do not apply loads to this pin.
Low impedance system ground
Connect this pin to V
Resistor connected between this pin and V
Charger output connected to battery’s positive terminal
Open drain logic output
Open drain logic output
1
2
3
4
5
6
7
8
Si9731DQ
TSSOP-16
Temperature Range
Temperature Range
Top View
- 40 to 85 °C
- 40 to 85 °C
BAT+
for 4.1 V charge termination in constant voltage mode
16
15
14
13
12
11
10
9
CHARGERPRESENT = (XCHARGERPRESENT)
CHARGERPOWER_ON = (XCHARGERPOWER_ON)
V
TRICKLE_V
4.1 V_TAP
GND
(N/C)
V
BAT+
REF
Function
BAT
to limit the trickle charge current.
BAT
S-60869-Rev. B, 22-May-06
Tape and Reel
Surface Mount
Document Number: 71321
Board Type
Package