SI9122A_08 VISHAY [Vishay Siliconix], SI9122A_08 Datasheet - Page 8

• Manufacturer Part Number: SI9122A_08
• Description: 500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers
• Manufacturer: VISHAY [Vishay Siliconix]

Si9122A
Vishay Siliconix
PIN CONFIGURATION
www.vishay.com
8
ORDERING INFORMATION
PIN DESCRIPTION
Pin Number
REG_COMP
10
11
12
13
14
15
16
17
18
19
20
V
1
2
3
4
5
6
7
8
9
R
INDET
V
GND
CS1
CS2
V
OSC
REF
V
EP
CC
IN
Si9122ADLP-T1-E3
Si9122ADQ-T1-E3
Contact Factory
Part Number
Eval Board
Si9122ADQ (TSSOP-20)
REG_COMP
1
2
3
4
5
6
7
8
9
10
C
V
PGND
Name
R
L_CONT
V
GND
BBM
SR
V
CS1
CS2
SR
BST
INDET
V
EP
SS
D
D
L
REF
OSC
CC
IN
X
H
L
H
L
Top View
Input supply voltage for the start-up circuit
Control signal for an external pass transistor
Supply voltage for internal circuitry
3.3 V reference
Ground
External resistor connection to oscillator
Voltage control input
V
falls below preset threshold voltages and provides the feed forward voltage.
Current limit amplifier negative input
Current limit amplifier positive input
Current limit compensation
Programmable break-before-make time connection to an external resistor to set time delay
Soft-start control - external capacitor connection
Signal transformer drive, sequenced with the primary side
Signal transformer drive, sequenced with the primary side
Power ground.
Low-side gate drive signal - primary
High-side source and transformer connection node
High-side gate drive signal - primary
Bootstrap voltage to drive the high-side N-Channel MOSFET switch
20
19
18
17
16
15
14
13
12
11
IN
under voltage detect and shutdown function input. Shuts down or disables switching when V
BST
D
L
D
PGND
SR
SR
SS
BBM
C
X
H
L
L_CONT
H
L
Temperature Range
Temperature Range
- 40 °C to 85 °C
- 10 °C to 70 °C
REG_COMP
V
Function
R
INDET
V
GND
CS1
CS2
V
OSC
REF
V
EP
CC
IN
Si9122ADLP (MLP65-20)
10
1
2
3
4
5
6
7
8
9
Surface Mount and Thru-Hole
Top View
Board Type
TSSOP-20
MLP65-20
Package
S-80038-Rev. D, 14-Jan-08
Document Number: 73492
20
19
18
17
16
15
14
13
12
11
BST
D
L
D
PGND
SR
SR
SS
BBM
C
X
H
L
L_CONT
H
L
INDET