
UA1538
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
8
www.unisonic.com.tw
QW-R109-023,B
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Dead Time
DEAD Pin Impedance
DEAD Pin Output Voltage
Starter Circuit
R
DEAD
V
DEAD
52
0.78
65
0.88
78
0.98
k
V
Starter Switching Voltage
V
STNM
VSYS1=VSYS2=0
START=0V
START=0V
3.2V,
2.3
2.5
2.7
V
Starter Switching Hysteresis Width
Discharge Release
Empty Detection
EMP Detection Voltage 1
EMP Detection Voltage 2
EMP Detection Hysteresis Voltage 1
EMP Detection Hysteresis Voltage 2
EMP Pin Output Voltage
EMP Pin Output Leak Current
BSEN Pin Input Resistance
V
SNHS
V
DIS
130
1.63
200
1.83
300
2.03
mV
V
V
EMPT1
V
EMPT2
V
EMHS1
V
EMHS2
V
EMP
I
EMPL
R
BSEN
VSEL=0V
ISEL=- 2μA
VSEL=0V
ISEL=- 2μA
Io=1mA, BSEN=1V
BSEN=2.4V
VSEL=0V
VSYS1=VSYS2=0V
BSEN=4.5V
VSELTH=BATT-SEL
BSEN=2.0V
2.1
1.7
25
25
17
2.2
1.8
50
50
23
2.3
1.9
100
100
0.5
1.0
27
V
V
mV
mV
V
A
k
BSEN Pin Leak Current
I
BSENL
1.0
V
SEL Pin Detection Voltage
V
SELTH
1.5
V
SEL Pin Detection Current
Reset Circuit
VSYS1 RESET Threshold Voltage
Ratio
RESET Detection Hysteresis Width
RESET Pin Output Voltage
RESET Pin PULL UP Resistance
AMUTE Pin Output Voltage 1
I
SELT
-2
A
H
SRT
Comparison with error amplifier
threshold voltage
Io=1mA, VSYS1=VSYS2=2.8V
Io=-1mA, VSYS1=VSYS2=2.8V
85
90
95
%
V
RSTHS
V
RST
R
RST
25
72
50
90
100
0.5
108
mV
V
k
V
AMT1
BATT
-0.4
BATT
-0.4
BATT
V
AMUTE Pin Output Voltage 2
V
AMT2
Io=-1mA, START=0V,
VSYS1=VSYS2=0V
BATT
V
AMUTE Pin PULL DOWN
Resistance
Op Amp
Input Bias Current
Input Offset Voltage
High Level Output Voltage
Low level Output Voltage
Output Drive Current (Source)
Output Drive Current (Sink)
Open Loop Voltage Gain
Slew Rate
Battery Charging Circuit
RCHG Pin Bias Voltage
R
AMT
77
95
113
k
I
BIAS
V
OIOP
V
OHOP
V
OLOP
I
SOU
I
SIN
G
VO
S
R
OP+=1.6V
R
L
=OPEN
R
L
=OPEN
50
GND
50
VSYS1
V
IN
=-75dBV, f=1kHz
300
5.5
0.2
-3.0
nA
mV
V
V
mA
mA
dB
V/
-5.5
2.8
0.4
0
-6.5
0.7
70
0.5
s
V
RCHG
CHGVcc=4.5V, RCHG=1.8k
CHGVcc=4.5V, RCHG=0.5 and
0.6V
CHGVcc=4.5V, RCHG=OPEN,
BATT=4.5V
CHGVcc=0.6V, RCHG=1.8k
BATT=4.5V
CHGVcc=4.5V, Io=300mA,
RCHG=0
.
0.71
0.81
0.91
V
RCHG Pin Output Resistance
R
RCHG
0.75
0.95
1.20
k
SEL Pin Leak Current 1
I
SELLK1
1.0
A
SEL Pin Leak Current 2
I
SELLK2
,
1.0
A
SEL Pin Saturation Voltage
V
SELCG
0.45
1.00
V