SI9124 Datasheet, PDF (4/16 Pages) Vishay Siliconix – 500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control

Si9124
Vishay Siliconix
New Product
SPECIFICATIONS^a
Parameter
PWM Operation
Duty Cycle^e
Pre-Regulator
Input Voltage (Continuous)
Input Leakage Current
Regulator Bias Current
Pre-Regulator Drive Capacility
Symbol
D_MAX
D_MIN
V_IN
I_LKG
I_REG1
I_REG2
I_START
V_CC Pre-Regulator Turn Off
Threshold Voltage
V_REG1
V_REG2
Undervoltage Lockout^d
V_UVLO
V_UVLO Hysteresis
Soft-Start
V_UVLOHYS
Soft-Start Current Output
Soft-Start Completion Voltage
Shutdown
I_SS1
I_SS2
V_{SS_COMP}
V_INDET Shutdown FN
V_SD
V_INDET Hysteresis
V_INDET Input Threshold Voltages
V_INDET - V_IN Under Voltage
V_UV
V_INDET Hysteresis
Over Temperature Protection
Activating Temperature
De-Activating Temperature
Converter Supply Current (V_CC)
Shutdown
I_CC1
Switching Disabled
I_CC2
Switching w/o Load^f
I_CC3
Switching with C_LOAD
I_CC4
V_CC Hiccup Current
I_HCUP
Test Conditions Unless Specified
CS1 = CS2 = 0 V, f_NOM = 500 kHz, V_IN = 48 V
V_INDET = 4.8 V; 10 V v V_CC v 13.2 V, V_CC2 = V_CC
Limits
- 40 to 85_C
Min^b Typ^c Max^b
Unit
f_OSC = 500 kHz
V_EP = 0 V
90
92
95
%
V_EP = 1.85 V
t15
I_IN = 10 mA
V_IN = 72 V, V_CC u V_REG
V_IN = 72 V, V_INDET t V_SD
V_IN = 72 V, V_INDET u V_REF
V_CC t V_REG
V_INDET u V_REF
V_INDET = 0 V
T_A = 25_C
V_CC Rising
T_A = 25_C
20
7.4
8.5
7.15
8.1
72
V
10
86
200
mA
4.5
7.5
mA
9.1
10.4
9.1
9.7
9.2
8.6
9.8
V
8.6
9.3
0.5
0 t V_SS t 2 V_be
2 V_be t V_SS t 4.8 V
Normal Operation
12
20
28
mA
60
100
200
7.35
8.1
8.85
V
V_INDET Rising
V_INDET
350
550
720
mV
200
V_INDET Rising
V_INDET
3.13
3.3
3.46
V
0.3
T_J Increasing
T_J Decreasing
160
_C
130
Shutdown, V_INDET = 0 V
50
140
350
mA
V_INDET t V_REF
1.8
2.8
3.8
V_INDET u V_REF, f_NOM = 500 kHz
3.0
4.4
6.8
V_CC = 12 V, OUT_A = OUT_B = 3 nF, C_{SEC_SYNC} = 0.3 nF
15.2
mA
CS2 - CS1 = 200 mV, C_OUTA = C_OUTB = 3 nF
C_{SEC_SYNC} = 0.3 nF
4.3
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4
Document Number: 72099
S-03638—Rev. B, 20-Mar-03