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
TEST CONDITIONS
CS– = 0,
DC gain
Current sense amplifier output (CAO)
Common mode rejection ratio
(CMRR)
Low-level output voltage (VOL)
High-level output voltage (VOH)
Output source current
Output sink current
3dB bandwidth
Current Error Amplifier (CEA) Section
Bias current
Current error amplifier voltage
Open-loop voltage gain (AVOL)
Gain bandwidth
Low-level output voltage (VOL)
High-level output voltage (VOH)
ICA–, ITRCK_CONTROL
Voltage Error Amplifier (VEA)
Bias current
Input offset voltage
Open-loop voltage gain (AVOL)
Gain bandwidth
Low-level output voltage (VOL)
High-level output voltage (VOH)
Voltage amplifier output leakage
Pulse Width Modulator Section
Maximum duty cycle
Modulator gain
PWM Oscillator (OSC) Section
Frequency
Overcharge Timer (OCT) Section
Frequency
Reference Section
Initial accuracy
Accuracy
Load regulation
Short circuit I
TJ = 25°C
0 < TJ < 70°C,
–40°C < TJ < 85°C,
0 < IO < 2 mA
REF = 0 V
8
4.06
VDD = 8 V to 18 V
VDD = 8 V to 18 V
4.05
4.03
4.10
4.10
4.10
3
20
4.14
4.15
4.17
15
30
V
V
V
mV
mA
7 V < VDD < 18 V
See Note 1
4.65
5.00
5.35
Hz
7 V < VDD < 18 V
90
100
110
kHz
CAO = 0.5 V
CAO = 1.7 V to 2.1 V
92
57
96
64
100
71
%
%/V
TJ = 25°C,
IO = 500
µA,
IO = –500
µA,
VCHGENB = GND,
VAO = 2.05 V
F = 100 kHz
VA– = 3.8 V
VA– = 4.4 V
STAT0 = 0,
STAT1 = 0,
3.8
–1
TJ = 25°C,
IO = 250
µA,
IO = –1 mA,
VCHGENB = GND
Total bias current;
8 V < VDD < 18 V,
F = 100 kHz
CA– = 3 V
CA– = 2 V
3.7
8
Regulating level
VCM = 4.1 V
60
0.75
90
3.00
0.2
4.1
1.0
4.3
1
8 V < VDD < 18 V,
8 V < VDD < 18 V,
CHGENB = REF
CAO = CA–
1.99
60
1
0.1
2.05
90
3
0.2
4.1
10
0.5
1.0
4.4
12
3.0
10
0.5
2.11
µA
V
dB
MHz
V
V
µA
µA
mV
dB
MHz
V
V
µA
CS+ = 0,
CS+ = CS– = 0 V
VCM = 1.1 V to 18 V,
CS+ = –0.2 V,
CS+ = 0.5 V,
IBAT = 3 V,
IBAT = 1 V,
VCM = 0 V,
See Note 2
VDD = 18 V
CS– = 0.5 V,
CS– = –0.2 V,
VID = 700 mV
VID = –700 mV
CS+ − CS– = 100 mV,
IO = 1 mA
IO = –500 mA
CS+ = –50 mV, CS+ = –250 mV
CS– = 50 mV,
CS– = 250 mV
MIN
4.9
4.9
1.99
50
TYP
5.0
5.0
2.05
65
0.2
3.7
–500
500
0.1
3.0
4.1
1
4.4
MAX
5.1
5.1
2.11
UNIT
V/V
V/V
V
dB
V
V
µA
µA
MHz
Current Sense Amplifier (CSA) Section
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