SI9137LG-T1 Vishay, SI9137LG-T1 Datasheet - Page 11
![no-image](/images/manufacturer_photos/0/6/697/vishay_sml.jpg)
SI9137LG-T1
Manufacturer Part Number
SI9137LG-T1
Description
Current Mode PWM Controllers Multi-Out Pwr-Supply Controller
Manufacturer
Vishay
Datasheet
1.SI9137LG.pdf
(15 pages)
Specifications of SI9137LG-T1
Duty Cycle (max)
95 %
Output Voltage
3.3 V, 5 V, 5 V to ADJ V
Output Current
1000 mA
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
Lead free / RoHS Compliant
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