SI9137LG Vishay, SI9137LG Datasheet - Page 11
![IC, PWM AND PSM CONVERTER CTRL, SSOP-28](/photos/18/99/189938/3833516_sml.gif)
SI9137LG
Manufacturer Part Number
SI9137LG
Description
IC, PWM AND PSM CONVERTER CTRL, SSOP-28
Manufacturer
Vishay
Datasheet
1.SI9137LG.pdf
(15 pages)
Specifications of SI9137LG
Primary Input Voltage
15V
No. Of Outputs
5
Output Voltage
12V
Output Current
1A
No. Of Pins
28
Operating Temperature Range
0°C To +90°C
Power Dissipation Pd
762mW
Termination Type
SMD
Duty Cycle (max)
95 %
Mounting Style
SMD/SMT
Package / Case
SSOP-28
Switching Frequency
330 KHz
Maximum Operating Temperature
+ 90 C
Minimum Operating Temperature
0 C
Synchronous Pin
No
Topology
Boost, Buck, Flyback
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SI9137LG
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
Document Number: 70874
S-40808—Rev. C, 26-Apr-04
DETAILED FUNCTIONAL BLOCK DIAGRAMS
SLC
COMP
REF
V
CSN
CSP
REF
Soft-Start
−
+
20 mV
V
Error
Amplifier
t
−
+
−
+
FIGURE 6. Buck-Boost Block Diagram (5- to 12-V Adjustable Controller)
Error
Amplifier
C/S
Amplifier
Soft-Start
100 mV
−
+
PWMCMP
Pulse
Skipping
Control
Current
Limit
SYNC
Rectifier Control
FIGURE 5. Buck Block Diagram (3.3-V and 5-Controllers)
t
−
+
−
+
PWM
Comparator
Pulse
Skipping
Control
Current Limit
SEQ
Control
Logic
RUN/STOP
SEQ
Control
Logic
RUN/STOP
1X
_
+
BBM
DH
DL
LX_
V
BST_
L
DH
DL
BSTFY
LXFY
CS_
FB_
DH
DL
FB
5
Vishay Siliconix
R
R
FBFY
X
Y
DHFY
DLFY
R
R
Internal voltage divider is
only used on 5-V output.
2
3
www.vishay.com
Si9137
11