Texas Instruments UC3825ADW, Dual PWM Controller, 1000 kHz 16-Pin, SOIC

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Subtotaal (1 tube van 40 eenheden)*

€ 271,16

(excl. BTW)

€ 328,12

(incl. BTW)

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RS-stocknr.:
922-3457
Fabrikantnummer:
UC3825ADW
Fabrikant:
Texas Instruments
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Merk

Texas Instruments

Maximum Switching Frequency

1000 kHz

Output Current

2 A

Number of Outputs

2

Control Method

Current, Voltage

Fall Time

20ns

Mounting Type

Surface Mount

Rise Time

20ns

Package Type

SOIC

Topology

Boost, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull

Pin Count

16

Maximum Duty Cycle

50%

Dimensions

10.28 x 7.52 x 2.35mm

PWM Controller Type

Current Mode

Length

10.28mm

Width

7.52mm

Height

2.35mm

Maximum Operating Temperature

+70 °C

Minimum Operating Temperature

0 °C

Flyback Controller, Voltage Control, Texas Instruments


The isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation to improve transient response to large load steps. Primary-Side Regulation (PSR) eliminates the need for an Optocoupler.

The Texas Instruments UC3825A family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead time control. Frequency accuracy is improved to 6%. Start-up supply current, typically 100 μA, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the start-up current specification. In addition each output is capable of 2-A peak currents during transitions.

Improved Versions of the UC3823/UC3825 PWMs
Compatible with Voltage-Mode or Current-Mode Control Methods
Practical Operation at Switching Frequencies to 1 MHz
50-ns Propagation Delay to Output
High-Current Dual Totem Pole Outputs (2-A Peak)
Trimmed Oscillator Discharge Current
Low 100-μA Start-up Current
Pulse-by-Pulse Current Limiting Comparator
Latched Overcurrent Comparator With Full Cycle Restart


Flyback Controllers, Texas Instruments


Current-Mode and Voltage-Mode PWM Controller
Primary-Side Regulation
Peak Power Mode
Low Power

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