SLUS249B − FEBRUARY 1997 − REVISED DECEMBER 2001
UCC3956
SWITCH MODE LITHIUM ION
BATTERY CHARGE CONTROLLER
electrical characteristics over recommended operating free-air temperature range,
T
A
= 0_C to 70_C for UCC3956, COSC = 500 pF, RSET = 70 kΩ, CTO = 169 nF, VDD = 12 V, T
A
= T
J
,
(unless otherwise noted)
PARAMETER
Threshold voltage
Input bias current
Voltage Sense Comparator (VSC) Section
Threshold voltage
Threshold voltage
Input bias current
Output Stage Section
VOL
VOH, volts below VDD
Rise time
Fall time
Maximum sink current
VOL
Charge control (CHG) Section
Threshold voltage
Charge-pin pull-down current
Turn−on threshold
Hysteresis
Input current
Quiescent current
Undervoltage lockout current
VDD = 5 V
NOTE 1: 14-bit tuner functionally tested at 500 kHz.
NOTE 2: Ensured by design, not production tested.
5
0.25
8
0.75
mA
mA
VCHG = 1 V
Undervoltage Lockout Current Section
1.5
8
6.00
75
1.8
23
6.50
150
2.1
40
7.0
400
V
µA
V
mV
IOUT = 10 mA
IOUT = –10 mA
COUT = 1 nF
COUT = 1 nF
VOUT = 12 V
IOUT = 1 mA
15
0.1
0.1
30
30
30
0.1
0.2
0.3
0.5
70
70
V
V
ns
ns
mA
V
Volts below VA+
CS+ = CS– = 0, function of IBAT = 2.05 V
Total bias current; regulating level
50
2.00
–0.5
125
2.05
–0.2
200
2.10
mV
V/V
µA
Charge current comparator (CIC) Section
TEST CONDITIONS
MIN
1.90
–0.5
TYP
2.05
–0.2
MAX
2.15
UNIT
V
µA
Charge Enable Comparator (CEC) Section
STAT0 and STAT1 Open Drain Outputs Section
4
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