MAX1924V Просмотр технического описания (PDF) - Maxim Integrated
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MAX1924V Datasheet PDF : 16 Pages
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Advanced Li+ Battery-Pack Protectors
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
DISCHARGE-CURRENT FAULT TIMING
MAX1894 toc10
VPKN - VBN
100mV/div
0
CHARGE-CURRENT FAULT TIMING
MAX1894 toc11
0
VPKN - VBN
100mV/div
PACK-SHORT CURRENT FAULT TIMING
MAX1894 toc12
VPKN - VBN
200mV/div
0
1ms/div
DSO
5V/div
0
1ms/div
CGO
5V/div
0
100µs/div
DSO
5V/div
0
Pin Description
PIN
NAME
FUNCTION
1
B4P
Cell 4 Positive Connection. Short B4P to B3P for MAX1924V.
2
VCC
Supply Input. Connect this pin to the top of the battery pack through a diode and a capacitor
(see the Typical Application Circuit).
3
B3P
Cell 3 Positive Connection
4
IC3
Internal Connection. Float this pin.
5
B2P
Cell 2 Positive Connection
6
IC2
Internal Connection. Float this pin.
7
B1P
Cell 1 Positive Connection
8
IC1
Internal Connection. Float this pin.
9
BN
Battery Negative. Connection for the cell 1 negative terminal and the top of the current-sense
resistor RSENSE. BN is also chip ground.
10
PKN
Pack Negative. The sense resistor (RSENSE) is connected between BN and PKN.
11
CTL
Control Input. Drive CTL low for normal operation. Drive CTL high to turn off the three external
protection MOSFETs.
12
SHDN
Shutdown. Drive SHDN low for normal operation. Drive SHDN high to put the device into shutdown
if no charger is present.
13
TKO
Trickle-Charge Driver Output. TKO drives the gate of an external P-channel trickle-charge MOSFET
low (on) in normal operation.
14
CGO
Fast-Charge Driver Output. CGO drives the gate of an external P-channel fast-charge MOSFET low
(on) in normal operation.
15
DSO
Discharge Driver Output. DSO drives the gate of an external P-channel discharge control MOSFET
low (on) in normal operation.
16
SRC
Common Source Connection for MOSFETs. SRC provides the bias for gate drivers DSO, TKO,
and CGO.
6 _______________________________________________________________________________________
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