L4981A - L4981B
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY VOLTAGE
VCC
Operating Supply Voltage
19.5
V
OVER VOLTAGE PROTECTION COMPARATOR
Vthr
Rising Threshold Voltage
Vref
5.1
Vref
V
-20mV
+20mV
V3Hys
I3
Hysteresis
180
250
0.05
1
320
1
mV
Input Bias Current
Propagation delay to output
A
µ
td
VOVP = Vthr +100mV
2
s
µ
OVER CURRENT PROTECTION COMPARATOR
Vth
td
Threshold Voltage
±30
0.9
105
5
mV
µs
Propagation delay to Output
Current Source Generator
Leakage Current
VOCP = Vthr -0.2V
0.4
85
only for L4981A
only for L4981B
Iipk
IL
VIPK = -0.1V
VIPK = -0.1V
65
µA
µA
CURRENT AMPLIFIER SECTION
Voffset
I9bias
Input Offset Voltage
Input Bias Current
Open Loop Gain
VMULT OUT = VSENSE = 3.5V
VSENSE = 0V
±2
mV
nA
dB
dB
-500
70
50
100
90
500
1.1V VCA OUT 6V
≤
≤
SVR
V5H
V5L
Supply Voltage Rejection
12V ≤ VCC ≤ 19V
MULT OUT = 3.5V VSENSE = 3.5V
68
V
Output High Voltage
Output Low Voltage
VMULT OUT = 200mV
CA OUT = -0.5mA, VIAC = 0V
6.2
V
V
I
VMULT OUT = -200mV
CA OUT = 0.5mA, VIAC = 0V
VMULT OUT = 200mV,
IAC = 0V, VCA-OUT = 3.5V
0.9
0.8
I
-I5
I5
Output Source Current
Output Sink Current
2
2
10
10
mA
mA
V
OUTPUT SECTION
V20L
V20H
Output Voltage Low
ISINK = 250mA
0.5
V
V
Output Voltage High
ISOURCE = 250mA
11.5
13
12.5
V
CC = 15V
tr
tf
Output Voltage Rise Time
Output Voltage Fall Time
Voltage Clamp
COUT = 1nF
COUT = 1nF
ISOURCE = 0mA
50
30
16
150
100
19
ns
ns
V
VGDRV
TOTAL STANDBY CURRENT SECTION
I19start
I19on
Supply Current before start up
Supply Current after turn on
VCC = 14V
0.3
8
0.5
12
mA
mA
VIAC = 0V, VCOSC = 0,
Pin17 = Open
I19
Operating Supply Current
Zener Voltage
Pin20 = 1nF
(*)
12
25
16
30
mA
V
VCC
20
UNDER VOLTAGE LOCKOUT SECTION
Vth ON
Turn on Threshold
Turn off Threshold
14.5
9
15.5
10
16.5
11
V
V
V
Vth OFF
Programmable Turn-on Threshold Pin 15 to VCC = 220K
Pin15 to GND = 33K
10.6
12
13.4
LOAD FEED FORWARD
ILFF
Bias Current
V6 = 1.6V
V6 = 5.3V
70
140
300
5.3
A
µ
200
µA
VI
Input Voltage Range
1.6
V
(*) Maximum package power dissipation limits must be observed.
5/17
STMICROELECTRONICS [ ST ]
