THE INFINITE POWER OF INNOVATION
SG1825C / SG2825C / SG3825C
HIGH-SPEED CURRENT-MODE PWM
PRODUCTION DATA SHEET
DESCRIP...
THE INFINITE POWER OF INNOVATION
SG1825C / SG2825C / SG3825C
HIGH-SPEED CURRENT-MODE PWM
PRODUCTION DATA SHEET
DESCRIPTION
The SG1825C is a high-performance pulse width modulator optimized for high frequency current-mode power supplies. Included in the controller are a precision voltage reference, micro power start-up circuitry, soft start, highfrequency oscillator, wideband error amplifier, fast current limit comparator, full double-pulse suppression logic, and dual totem pole output drivers. Innovative circuit design and an advanced linear
Schottky process result in very short propagation delays through the current limit comparator, logic, and output
drivers. This device can be used to implement either current mode or voltagemode switching power supplies. It also is useful as a series-resonant controller to frequencies beyond 1MHz. The SG1825C is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2825C is characterized for the industrial range of -25°C to 85°C, and the SG3825C is selected for the commercial range of 0°C to 70°C.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
INITIAL OSCILLATOR ACCURACY
15
Sample Size = 279 Mean 401.661 Std. Dev. = 3.8
10
KEY FEATURES
IMPROVED REFERENCE
INITIAL TOLERANCE (±1%
max.)
IMPROVED OSCILLATOR
INITIAL ACCURACY (±3% typ.)
IMPROVED STARTUP
CURRENT (500µA typ.)
PROP DELAY TO OUTPUTS
(50ns typ.)
10V TO 30V OPERAT...