Features: • Trimmed Oscillator for Precise Frequency Control• Oscillator Frequency Guaranteed at 250 kHz• Current Mode Operation to 500 kHz• Automatic Feed Forward Compensation• Latching PWM for Cycle-By-Cycle Current Limiting• Internally Trimmed Reference with ...
H3842S: Features: • Trimmed Oscillator for Precise Frequency Control• Oscillator Frequency Guaranteed at 250 kHz• Current Mode Operation to 500 kHz• Automatic Feed Forward Compensati...
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Symbol |
Parameter |
Value |
Unit |
Vi |
Supply Voltage (low impedance source) |
30 |
V |
Supply Voltage (Ii<30mA) |
Self Limiting |
||
Io |
Output Current |
±1 |
A |
Eo |
Output Energy (capacitive load) |
5 |
uJ |
Analog Inputs (pin 2, 3) |
-0.3 to 5.5 |
V | |
Error Amplifier Output Sink Current |
10 |
mA | |
Ptot |
Power Dissipation at Tamb25oC |
800 |
mW |
Tstg |
Storage Temperature Range |
-65 to 150 |
oC |
TJ |
Junction Operating Temperature |
-40 to 150 |
oC |
TL |
Lead Temperature (soldering 10s) |
300 |
oC |
The H3842S is high performance fixed frequency current mode controllers. That is specifically designed for Off- Line and DC To DC converter applications offering the designer a costeffective solution with minimal external components. These H3842S integrated circuits feature a trimmed oscillator for precise duty cycle control. A temperature compensated reference, high gain error amplifier, current sensing compara-tor, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering.