UCC3810

ACTIVO

PWM sincronizado de doble canal con modo de corriente y de 0 °C a 70 °C

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Hoja de datos

document-pdfAcrobat Dual Channel Synchronized Current Mode PWM datasheet (Rev. D) (Inglés)

UCC3810

ACTIVO

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Detalles del producto

Vin (max) (V)

11

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Flyback

Rating

Catalog

Features

Adjustable switching frequency, Error amplifier, Leading edge blanking, Multi-topology, Programmable max duty dycle, Soft start, Synchronization pin

Duty cycle (max) (%)

50

Vin (max) (V)

11

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Flyback

Rating

Catalog

Features

Adjustable switching frequency, Error amplifier, Leading edge blanking, Multi-topology, Programmable max duty dycle, Soft start, Synchronization pin

Duty cycle (max) (%)

50

PDIP (N)

16

181.42 mm² 19.3 x 9.4

SOIC (DW)

16

106.09 mm² 10.3 x 10.3

Single Oscillator Synchronizes Two PWMs
150-µA Startup Supply Current
2-mA Operating Supply Current
Operation to 1 MHz
Internal Soft-Start
Full-Cycle Fault Restart
Internal Leading-Edge Blanking of the Current Sense Signal
1-A Totem Pole Outputs
75-ns Typical Response from Current Sense to Output
1.5% Tolerance Voltage Reference

Single Oscillator Synchronizes Two PWMs
150-µA Startup Supply Current
2-mA Operating Supply Current
Operation to 1 MHz
Internal Soft-Start
Full-Cycle Fault Restart
Internal Leading-Edge Blanking of the Current Sense Signal
1-A Totem Pole Outputs
75-ns Typical Response from Current Sense to Output
1.5% Tolerance Voltage Reference

The UCC3810 is a high-speed BiCMOS controller integrating two synchronized pulse width modulators for use in off-line and dc-to-dc power supplies. The UCC3810 family provides perfect synchronization between two PWMs by usin g the same oscillator. The oscillator’s sawtooth waveform can be used for slope compensation if required.

Using a toggle flip-flop to alternate between modulators, the UCC3810 ensures that one PWM does not slave, interfere, or otherwise affect the other PWM. This toggle flip- flop also ensures that each PWM is limited to 50% maximum duty cycle, insuring adequate off-time to reset magnetic elements. This device contains many of the same elements of the UC3842 current mode controller family, combined with the enhancements of the UCC3802. This minimizes power supply parts count. Enhancements include leading edge blanking of the current sense signals, full cycle fault restart, CMOS output drivers, and outputs which remain low even when the supply voltage is removed.

The UCC3810 is a high-speed BiCMOS controller integrating two synchronized pulse width modulators for use in off-line and dc-to-dc power supplies. The UCC3810 family provides perfect synchronization between two PWMs by usin g the same oscillator. The oscillator’s sawtooth waveform can be used for slope compensation if required.

Using a toggle flip-flop to alternate between modulators, the UCC3810 ensures that one PWM does not slave, interfere, or otherwise affect the other PWM. This toggle flip- flop also ensures that each PWM is limited to 50% maximum duty cycle, insuring adequate off-time to reset magnetic elements. This device contains many of the same elements of the UC3842 current mode controller family, combined with the enhancements of the UCC3802. This minimizes power supply parts count. Enhancements include leading edge blanking of the current sense signals, full cycle fault restart, CMOS output drivers, and outputs which remain low even when the supply voltage is removed.

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