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SI9122 数据表(PDF) 8 Page - Vishay Siliconix

部件名 SI9122
功能描述  500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers
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制造商  VISHAY [Vishay Siliconix]
网页  http://www.vishay.com
标志 VISHAY - Vishay Siliconix

SI9122 数据表(HTML) 8 Page - Vishay Siliconix

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Document Number: 71815
S-80038-Rev. J, 14-Jan-08
Vishay Siliconix
Si9122
PIN CONFIGURATION
20
19
18
17
1
2
3
4
16
15
14
13
5
6
7
8
VIN
BST
REG_COMP
DH
VCC
LX
VREF
DL
GND
PGND
ROSC
SRH
EP
SRL
VINDET
SS
Si9122DQ (TSSOP-20)
Top View
12
11
9
10
CS1
BBM
CS2
CL_CONT
Si9122DLP (MLP65-20)
Top View
BST
DH
LX
DL
PGND
SRH
SRL
SS
BBM
CL_CONT
VIN
REG_COMP
VCC
VREF
GND
ROSC
EP
VINDET
CS1
CS2
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
ORDERING INFORMATION
Lead (Pb)-free
Part Number
Temperature Range
Package
Si9122DQ-T1-E3
- 40 °C to 85 °C
TSSOP-20
Si9122DLP-T1-E3
MLP65-20
Eval Kit
Temperature Range
Board Type
Si9122DB
Issue 3
- 10 °C to 70 °C
Surface Mount and Thru-Hole
PIN DESCRIPTION
Pin Number
Name
Function
1
VIN
Input supply voltage for the start-up circuit
2
REG_COMP
Control signal for an external pass transistor
3
VCC
Supply voltage for internal circuitry
4
VREF
3.3 V reference, decoupled with 1 µF capacitor
5
GND
Ground
6
ROSC
External resistor connection to oscillator
7
EP
Voltage control input
8
VINDET
VIN under voltage detect and shutdown function input. Shuts down or disables switching when VINDET
falls below preset threshold voltages and provides the feed forward voltage.
9
CS1
Current limit amplifier negative input
10
CS2
Current limit amplifier positive input
11
CL_CONT
Current limit compensation
12
BBM
Programmable break-before-make time connection to an external resistor to set time delay
13
SS
Soft-start control - external capacitor connection
14
SRL
Signal transformer drive, sequenced with the primary side
15
SRH
Signal transformer drive, sequenced with the primary side
16
PGND
Power ground
17
DL
Low-side gate drive signal - primary
18
LX
High-side source and transformer connection node
19
DH
High-side gate drive signal - primary
20
BST
Bootstrap voltage to drive the high-side N-Channel MOSFET switch


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