Features: 384x series pin-to-pin compatible Linearly decreasing PWM frequency Burst-mode at low/zero load 5uA start-up current 5mA operating current Vcc over voltage protection Cycle-by-cycle current limiting Zero cross-conduction Slew rate controlled high current totem pole output Fast current s...
SG3842G: Features: 384x series pin-to-pin compatible Linearly decreasing PWM frequency Burst-mode at low/zero load 5uA start-up current 5mA operating current Vcc over voltage protection Cycle-by-cycle curre...
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|
Parameter |
Value |
Symbol |
Test Condition |
Unit |
|
Supply voltage |
25 28 |
Vcc |
Low impedance source Zener clamp |
V |
|
Zener current |
10 |
Iz |
mA | |
|
FB/SENSE terminal input voltage |
-0.3 to 5.5V |
V IN |
FB, SENSE |
mW |
|
Error amplifier sink current |
10 |
ISINK |
MW | |
|
Power dissipation |
800 400 |
Pd |
at Ta<50°C DIP SOP |
°C/W |
|
Thermal resistance
|
82.5 141 |
R j-a |
Junction-air DIP SOP |
W |
|
Operating junction temperature |
150 |
TJ |
- |
°C |
|
ESD Capability, HBM model |
-40 to 125 |
- |
°C | |
|
Lead temperature (Soldering) |
260 220 |
TL |
10 sec DIP 20 sec SOP |
KV |
|
ESD Capability, Machine model |
200 |
- |
V |
The SG3842G series of current-mode PWM controllers combines high performance with Green-mode power saving features. SG3842G controllers are fully pin-to-pin compatible with bipolar UC384x devices, but they have improved features and functionality. SG3842G series controllers are compatible with the BiCMOS fabrication process, enabling the use of low start-up current and operating currents. This feature further mproves power conversion efficiency. The minimalstart-up current has been reduced to 5uA, and the minimum operating current has been reduced to 5mA. Each SG3842G has a slew rate controlled high current totem pole output, ideally suited for driving a power MOSFET while keeping EMI low.