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UC3824

Features: · Complementary Outputs· Practical Operation Switching Frequencies o 1MHz· 50ns Propagation Delay to Output· High Current Dual Totem Pole Outputs 1.5A Peak)· Wide Bandwidth Error Amplifier· Fully Latched Logic with Double Pulse uppression· Pulse-by-Pulse Current Limiting· Soft Start / Ma...

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SeekIC No. : 004535603 Detail

UC3824: Features: · Complementary Outputs· Practical Operation Switching Frequencies o 1MHz· 50ns Propagation Delay to Output· High Current Dual Totem Pole Outputs 1.5A Peak)· Wide Bandwidth Error Amplifier...

UC3824 Data Sheet

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Part Number:
UC3824
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Complementary Outputs
· Practical Operation Switching Frequencies o 1MHz
· 50ns Propagation Delay to Output
· High Current Dual Totem Pole Outputs 1.5A Peak)
· Wide Bandwidth Error Amplifier
· Fully Latched Logic with Double Pulse uppression
· Pulse-by-Pulse Current Limiting
· Soft Start / Max. Duty Cycle Control
· Under-Voltage Lockout with Hysteresis
· Low Start Up Current (1.1 mA)
· Trimmed Bandgap Reference (5.1V ± 1%)


Pinout

Connection Diagram


Specifications

Supply Voltage (Pins 13, 15) . . . . . . . . . . . . . . . . . . . . . . 30V
Output Current, Source or Sink (Pins 11, 14)
DC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   0.5A
Pulse (0.5s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2.0A
Analog Inputs
(Pins 1, 2, 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . .   -0.3V to 7V
(Pin 8, 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..  -0.3V to 6V
Clock Output Current (Pin 4) . . . . . . . . . . . . . . . . . . . . .. -5mA
Error Amplifier Output Current (Pin 3) . . . . . . . . . . . . . .. . 5mA
Soft Start Sink Current (Pin 8) . . . . . . . . . . . . . . . . . . . .  20mA
Oscillator Charging Current (Pin 5) . . . . . . . . . . . . . . . . . .-5mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W
Storage Temperature Range . . . . . . . . . . .  -65°C to +150°C
Lead Temperature (Soldering, 10 seconds) . . . . . . . . . 300°C

Note 1: All voltages are with respect to GND (Pin 10); all currents re positive into, negative out of part; pin numbers refer to IL-16 package.
Note 3: Consult Unitrode Integrated Circuit Databook for thermal imitations and considerations of package.


Description

The UC1824 family of PWM control ICs is optimized for high frequency witched mode power supply applications. Particular care as given to minimizing propagation delays through the comparators nd logic circuitry while maximizing bandwidth and slew rate of the rror amplifier. This controller is designed for use in either currentmode r voltage mode systems with the capability for input voltage eed-forward.

Protection circuitry includes a current limit comparator with a 1V hreshold, a TTL compatible shutdown port, and a soft start pin which ill double as a maximum duty cycle clamp. The logic is fully latched o provide jitter free operation and prohibit multiple pulses at an output. n under-voltage lockout section with 800mV of hysteresis assures ow start up current. During under-voltage lockout, the outputs e high impedance.

These devices feature totem pole outputs designed to source and ink high peak currents from capacitive loads, such as the gate of a ower MOSFET. The on state is designed as a high level.




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