SI9137LG Vishay, SI9137LG Datasheet - Page 9
![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
TIMING DIAGRAMS
(Sysmon EN)
(Sysmon EN)
RUN/STOP
RUN/STOP
f
OSC EN
max
f
OSC EN
max
V
OSC
(SS)
V
OSC
REF
(SS)
V
DH
REF
D
V
V
DH
DL
IN
V
L
L
IN
L
2.4 V
t
BBM
FIGURE 2. Converter is Enabled Before V
FIGURE 3. Converter is Enabled After V
2.4 V
4 ms
4 ms
IN
IN
is Applied
is Applied
The converter is enabled
V
LDO is activated after V
applied
REF circuit is activated after V
becomes available
After V
the converter is turned on
Oscillator is activated
Slow soft-start gradually increases
the maximum inductor current
High-side gate drive duty ratio
gradually increases to maximum
Low-side gate drive
The converter is enabled
V
LDO is activated after V
applied
REF circuit is activated after V
becomes available
After V
the converter is turned on
Oscillator is activated
Slow soft-start gradually increases
the maximum inductor current
IN
IN
is applied
is applied
Vishay Siliconix
REF
REF
goes above 2.4 V,
goes above 2.4 V,
IN
IN
www.vishay.com
Si9137
is
is
L
L
9