SI9122E Datasheet, PDF (3/20 Pages) Vishay Siliconix – 500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers

Si9122E
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS All voltages referenced to GND = 0 V
Parameter
Storage Temperature
Operating Junction Temperature
Power Dissipation^a
Thermal Impedance (θ_JA)
TSSOP-20^b
MLP65-20^c
TSSOP-20
MLP65-20
Notes:
a. Device mounted on JEDEC compliant 1S2P test board.
b. Derate 14 mW/°C above 25 °C.
c. Derate 26 mW/°C above 25 °C.
Limit
- 65 to 150
150
850
2500
75
38
Unit
°C
mW
°C/W
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING RANGE All voltages referenced to GND = 0 V
Parameter
Limit
Unit
V_IN
V_CC
CV_CC
f_OSC
R_OSC
R_BBM
C_REF
C_BOOST
Analog Inputs
Digital Inputs
Reference Voltage Output Current
36 to 75
V
10.5 to 13.2
≥ 4.7
µF
200 to 500
kHz
30 to 72
kΩ
22 to 50
0.1
µF
0.1
0 to V_CC - 2
V
0 to V_CC
0.1 to 2.5
mA
SPECIFICATIONS^a
Parameter
Reference (3.3 V)
Output Voltage
Short Circuit Current
Load Regulation
Power Supply Rejection
Oscillator
Accuracy (1 % R_OSC)
Max Frequency^g
Foldback Frequency^d
Error Amplifier
Input Bias Current
Gain
Bandwidth
Power Supply Rejection
Slew State
Document Number: 73866
S-80112-Rev. D, 21-Jan-08
Symbol
V_REF
I_SREF
dVr/dir
PSRR
F_MAX
F_FOBK
I_BIAS
A_V
BW
PSRR
SR
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_CC = 12 V, 25 °C Load = 0 mA
V_REF = 0 V
I_REF = 0 to - 2.5 mA
at 100 Hz
R_OSC = 30 kΩ, f_NOM = 500 kHz
R_OSC = 22.6 kΩ
f_NOM = 500 kHz, V_CS2 - V_CS1 > 150 mV
V_EP = 0 V
at 110 Hz
Limits
- 40 to 85 °C
Min.^b
Typ.^c
Max.^b
Unit
3.2
3.3
3.4
V
- 50
mA
- 30
- 75
mV
60
dB
- 20
20
%
400
500
600
kHz
100
- 40
- 15
µA
- 2.2
V/V
5
MHz
60
dB
0.5
V/µs
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