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5962-8768101EA

High Speed PWM Controller

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5962-8768101EA General Description

The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.

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

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

5962-8768101ea 5962-8768101ea

Key Features

  • Compatible with Voltage or Current Mode Topologies
  • Practical Operation Switching Frequencies to 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 Suppression
  • Pulse-by-Pulse Current Limiting
  • Soft Start / Max. Duty Cycle Control
  • Under-Voltage Lockout with Hysteresis
  • Low Start Up Current (1.1mA)
5962-8768101ea 5962-8768101ea
5962-8768101ea 5962-8768101ea

Specifications

Category Integrated Circuits (ICs)Power Management (PMIC)DC DC Switching Controllers Series *
Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current
Duty cycle (max) (%) 80 Switching frequency (max) (kHz) 1000
Features Error amplifier, Multi-topology, Soft start, Synchronization pin UVLO thresholds on/off (V) 9.2/8.4
Operating temperature range (°C) -55 to 125 Rating Military
Gate drive (typ) (A) 1.5 Vin (max) (V) 20
feature-type Current Mode PWM Controller feature-control-method Current/Voltage
feature-topology Boost|Flyback|Forward|Full-Bridge|Half-Bridge|Push-Pull feature-number-of-pwm-outputs 2
feature-switching-frequency-khz 1000 feature-maximum-duty-cycle- 80
feature-process-technology feature-output-voltage-v
feature-minimum-operating-supply-voltage-v 12 feature-maximum-operating-supply-voltage-v 20
feature-maximum-supply-current-ma 33 feature-maximum-power-dissipation-mw 1000
feature-synchronous-pin No feature-packaging Tube
feature-rad-hard No feature-pin-count 16
feature-cecc-qualified No feature-esd-protection
feature-escc-qualified feature-military Yes
feature-aec-qualified No feature-aec-qualified-number
feature-auto-motive No feature-p-pap No
feature-eccn-code EAR99 feature-svhc
feature-svhc-exceeds-threshold No

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L
L**n 05/03/2024

Shipping seven days. In a simple postal package with a puffy. The boards have not yet checked, but are executed neatly. There was no need to communicate with the seller. Thank you.

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