SI9122A, SI9122ADLP-T1-E3, SI9122ADQ-T1-E3 Selling Leads, Datasheet
MFG:Vishay Package Cooled:QFN-20 D/C:2010+
SI9122A, SI9122ADLP-T1-E3, SI9122ADQ-T1-E3 Datasheet download
Part Number: SI9122A
MFG: Vishay
Package Cooled: QFN-20
D/C: 2010+
SI9122A, SI9122ADLP-T1-E3, SI9122ADQ-T1-E3
- Table of contents:
Info of SI9122A
Info of SI9122ADLP-T1-E3
Info of SI9122ADQ-T1-E3
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About SI9122A
PDF/DataSheet Download
Datasheet: SI9122A
File Size: 247542 KB
Manufacturer: VISAY [Vishay Siliconix]
Download : Click here to Download
About SI9100
PDF/DataSheet Download
Datasheet: SI9100
File Size: 92966 KB
Manufacturer: VISAY [Vishay Siliconix]
Download : Click here to Download
About SI9100
PDF/DataSheet Download
Datasheet: SI9100
File Size: 92966 KB
Manufacturer: VISAY [Vishay Siliconix]
Download : Click here to Download
SI9122A General Description
Si9122A is a half-bridge controller IC ideally suited to fixed telecom applications where high efficiency is required at low output voltages (e.g. <3.3 V). Designed to operate within the fixed telecom voltage range of 3375 V and withstand 100 V, 100 ms transients, the IC is capable of controlling and driving both the low and high-side switching devices of a half bridge circuit and also controlling the switching devices on the secondary side of the bridge. Due to the very low on-resistance of the secondary MOSFETs, a significant increase in conversion efficiency can be achieved as compared with conventional Schottky diodes. Control of the secondary devices is by means of a pulse transformer and a pair of inverters. Such a system has efficiencies well in excess of 90% even for low output voltages. On-chip control of the dead time delays between the primary and secondary synchronous signals keep efficiencies high and prevent accidental destruction of the power transformer. An external resistor sets the switching frequency from 200 kHz to 625 kHz.
Si9122A has advanced current monitoring and control circuitry which allow the user to set the maximum current in the primary circuit. Such a feature acts as protection against output shorting and also provides constant current into large capacitive loads during start-up or when paralleling power supplies. Current sensing is by means of a sense resistor on the low-side primary device.
SI9122A Maximum Ratings
VIN (Continuous) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 V
VIN (100 ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.5 V
VBST (Continuous) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 V
(100 ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.2 V
VLX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V
VBST VLX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V
VREF, ROSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
HV Pre-Regulator Input Current (continuous) . . . . . . . . . . . . . . . . . . . . . 5 mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to 150
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Power Dissipationa
TSSOP-20b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850 mW
MLP65-20c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 mW
Thermal Impedance (JA)
TSSOP-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75/W
MLP65-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38/W
Notes
a. Device mounted on JEDEC compliant 1S2P test board..
b. Derate 14 mW/above 25.
c. Derate 26 mW/ above 25.
VIN (100 ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.5 V
VBST (Continuous) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 V
(100 ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.2 V
VLX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V
VBST VLX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V
VREF, ROSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
HV Pre-Regulator Input Current (continuous) . . . . . . . . . . . . . . . . . . . . . 5 mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to 150
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Power Dissipationa
TSSOP-20b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 850 mW
MLP65-20c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 mW
Thermal Impedance (JA)
TSSOP-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75/W
MLP65-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38/W
Notes
a. Device mounted on JEDEC compliant 1S2P test board..
b. Derate 14 mW/above 25.
c. Derate 26 mW/ above 25.
SI9122A Features
` 28-V to 75-V Input Voltage Range
` Compatible with ETSI 300 132-2
` Integrated ±1A Half Bridge Primary Drivers
` Secondary Synchronous Rectifier Control Signals With
Programmable Deadtime Delay
` Voltage Mode Control
` Voltage Feedforward Compensation
` High Voltage Pre-Regulator Operates During Start-Up
` Current Sensing On Low-Side Primary Device
` Frequency Foldback Eliminates Constant Current Tail
` Advanced Maximum Current Control During Start-Up and
Shorted Load
` Low Input Voltage Detection
` Programmable Soft-Start Function
` Over Temperature Protection
` Compatible with ETSI 300 132-2
` Integrated ±1A Half Bridge Primary Drivers
` Secondary Synchronous Rectifier Control Signals With
Programmable Deadtime Delay
` Voltage Mode Control
` Voltage Feedforward Compensation
` High Voltage Pre-Regulator Operates During Start-Up
` Current Sensing On Low-Side Primary Device
` Frequency Foldback Eliminates Constant Current Tail
` Advanced Maximum Current Control During Start-Up and
Shorted Load
` Low Input Voltage Detection
` Programmable Soft-Start Function
` Over Temperature Protection
SI9122A Typical Application
· Network Cards
· Power Supply Modules
· Power Supply Modules
SI9122A Connection Diagram
SI9122ADLP-T1-E3 General Description
Si9122A datasheet
SI9122ADQ-T1-E3 General Description
Si9122A datasheet
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