SI9122E Datasheet, PDF (4/20 Pages) Vishay Siliconix – 500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers

Si9122E
Vishay Siliconix
SPECIFICATIONS^a
Parameter
Current Sense Amplifier
Input Voltage CM Range
Current Sense Amplifier
Input Amplifier Gain
Input Amplifier Bandwidth
Input Amplifier Offset Voltage
C_{L_CONT} Current
Symbol
V_CM
A_VOL
BW
V_OS
I_{CL_CONT}
Test Conditions
Unless Otherwise Specified
f_NOM = 500 kHz, V_IN = 75 V
V_INDET = 7.5 V; 10.5 V ≤ V_CC ≤ 13.2 V
V_CS1 - GND, V_CS2 - GND
dV_CS = 0
dV_CS = 100 mV
dV_CS = 100 mV
Limits
- 40 to 85 °C
Min.^b
Typ.^c
Max.^b
± 150
17.5
5
±5
120
0
>2
Lower Current Limit Threshold
Upper Current Limit Threshold
Hysteresis
C_{L_CONT} Clamp Level
PWM Operation
Duty Cycle
Pre-Regulator
Input Voltage
Input Leakage Current
Regulator Bias Current
Regulator_Comp
Pre-Regulator drive Capability
V_TLCL
V_THCL
C_{L_CONT}
I_PD = I_PU - I_{CL_CONT} = 0
I_PD > 2 mA
I_PU < 500 µA
I_PU = 500 µA
D_MAX
D_MIN
f_OSC = 500 kHz, 25 °C
V_INDET = 4.8 V, V_IN = 48 V
V_EP = 0 V
Primary
Secondary
V_EP = 1.75 V
V_CS2 - V_CS1 > 150 mV
+ V_IN
I_LKG
I_REG1
I_REG2
I_SOURCE
I_SINK
I_START
I_IN = 10 µA
V_IN = 75 V, V_CC > V_REG
V_IN = 75 V, V_INDET < V_SD
V_IN = 75 V, V_INDET > V_REF
V_CC = 12 V
V_CC < V_REG
V_CC Pre-Regulator Turn Off
Threshold Voltage
V_REG1
V_REG2
V_INDET > V_REF
V_INDET = 0 V
T_A = 25 °C
Undervoltage Lockout
V_UVLO
V_ULVO Hysteresis^f
V_UVLOHYS
Soft-Start
Soft-Start Current Output
I_SS
Soft-Start Completion Voltage
V_{SS_COMP}
Shutdown
V_INDET Shutdown
V_SD
V_SD Hysteresis
V_INDET Input Threshold Protection
V_INDET - V_IN Under Voltage
V_UV
V_UV Hysteresis
Over Temperature Voltages
Activating Temperature
OTP_on
De-Activating Temperature
OTP_off
V_CC Rising
T_A = 25 °C
Start-Up Condition
Normal Operation
V_INDET Rising
V_INDET Falling
V_INDET Rising
V_INDET Falling
T_J Increasing
T_J Decreasing
0.6
88
90
36
- 29
50
20
7.4
8.5
7.15
8.1
12
7.35
350
3.13
0.23
100
150
- 50
91
93
< 17
3
86
8
- 19
82
9.1
9.1
9.2
8.8
8.8
0.5
20
8.05
550
200
3.3
0.3
135
113
1.5
94
95
75
10
200
14
-9
110
10.4
9.7
9.8
9.3
28
8.85
720
3.46
0.35
Unit
mV
dB
MHz
mV
µA
mA
mV
V
%
%
V
µA
mA
µA
mA
V
µA
V
mV
V
°C
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4
Document Number: 73866
S-80112-Rev. D, 21-Jan-08