1-3 ICs for Switching Mode Power Supplies
STR-A6100 Series
sFeatures
• PRC [Pulse Ratio Control]: (8
µ
s fixed off-time, variable on-time)
Low-EMI noise operation thanks to the quasi-jittering operation that varies the switching frequency within a
range from about 63kHz to 120kHz according to load variations.
• Auto burst standby: (Power consumption at no load <100mW at AC264V)
Enables very low power consumption at no load.
Typical results of a 5W universal input power supply: Pin= 35mW at AC110V
Pin=43mW at AC220V
• Auto bias function
This function stabilizes operation during Auto Burst Standby mode, by controlling stably the hiccup mode caused
by UVLO. The Auto Bias function forces the IC to turn on before the V
CC
voltage drops down to V
CC
(OFF),
thereby stabilizing the entire power supply operation.
• Startup circuit
600V BCD process allows direct connection of the STARTUP pin to the rectified high voltage rail. This reduces
component count and improves overall efficiency.
• Current mode control
• Leading edge blanking
Requires no external Low-pass filter circuit preventing the malfunction due to the surge current at turn-on.
• Built-in Power MOSFET guaranteeing avalanche energy capability
Thus, surge absorber circuit can be simplified and also no VDSS derating is required.
• Versatile protecting functions
• Over current protection ------------------ Pulse by pulse
• Over voltage protection ------------------ With latch
• Overload protection ----------------------- Auto restart
• Thermal shutdown ------------------------- With latch
Pin Assignment (TOP VIEW)
Startup
5
4
3
Drain
Drain
7
8
2
1
V
FB
/OLP
GND
V
CC
S/OCP
sApplications
•
Battery Charger ------------------------------ Cell Phone, Digital Still Camera, Camcorder, Shaver, Emergency light, Guidance light, etc.
•
Standby Power Supply --------------------- CRT TV, Projection TV, LCD TV, PDP TV, Desktop PC, LBP, Audio system, etc.
•
Compact SMPS ------------------------------ Inkjet printer, DVD Player/Recorder, VCR, Set Top Box, etc. (SMPS: Switching Mode Power Supply)
•
Auxiliary Power Supply for Controller -- Air conditioner, Refrigerator, Washer, Dish Washer, etc.
sLineup
Part Number
STR-A6131
STR-A6132
STR-A6153E
STR-A6151
STR-A6159
STR-A6169
650V
800V
V
DSS
500V
R
DS(ON)
3.95Ω
2.62Ω
1.90Ω
3.95Ω
6.00Ω
19.20Ω
V
IN(AC)
100V/120V
100V/120V
230V/85V to 264V
230V/85V to 264V
230V/85V to 264V
230V/85V to 264V
Pout
12W
16W
24W/20W
16W/12W
13W/12W
8W/5W
122
ICs