Pulser Series — 1/8 Brick 300W/25A

Overview

Pulsed Load Specialist

The Pulser series delivers 300W/25A from an 18~36V input in the industry-standard 1/8 brick package. Patented Buck-Reset Forward topology with PR-SR rectification stage achieves 94% efficiency and 248 W/in³ power density. Optimized for pulsed-load applications with UltraFast i-Limit technology that eliminates short-circuit current runaway.

300W

Max Output Power

94%

Peak Efficiency

248

W/in³ Power Density

Pulsed Load Optimized

Proprietary Pulsed-load-signal-estimator (Pulser) circuit suppresses peak deviation under ±8% for 0~90% or 0~100% load steps within 40µs. Add 470µF for ±5% or 2200µF for ±3% deviation.

UltraFast i-Limit

Proprietary technology reduces current loop propagation delay from 350µs to 60ns, effectively limiting output current to 1/3 of conventional converters. Superior driving capability for motors and capacitive loads.

Metal Enclosed Package

All power semiconductor chips attached to the inner surface of a six-sided metallic case for homogeneous heat spreading. Low thermal resistance with M2 screw mounting. Weight: 32g.

Models

Standard Model

The P0824120 delivers 12V/25A from 18~36V input. Contact factory for custom input/output configurations.

Model	Input	Vout	Iout	Max Power	Efficiency	Freq
P0824120	18–36V	12V	25A	300W	94%	450KHz

Specifications

Technical Specifications

All specifications are typical at nominal input, full load, and 25°C unless otherwise noted.

Absolute Maximum Ratings

Storage Temperature	-55°C to +125°C
Input Voltage (24V Op)	-0.5V to +40Vdc
Input Voltage (48V Op)	-0.5V to +80Vdc
Input Transient (24V)	50V Maximum
Input Transient (48V)	100V Maximum
I/O Isolation	2.0KV Minimum
I to Case Isolation	1.0KV Minimum
O to Case Isolation	1.0KV Minimum
Remote Control Voltage	-0.5V to +12Vdc

General Parameters

Switching Frequency	450KHz
MTBF (Bellcore TR-332)	4.50 × 10⁶ hrs
OTP	TC based
Weight (Metal Enclosed)	32g

Control Functions

RC Logic High	+3.0V to +6.5V
RC Logic Low	0V to +1.0V
RC Pin Input Current	-0.5mA to +1.5mA

Input

Voltage Range (24V)	+18V to +36Vdc
Voltage Range (48V)	+36V to +75Vdc
Reflected Ripple Current	20mA rms / 60mAp-p
Power ON (24V/48V)	17~18V / 34~36V
Power OFF (24V/48V)	15.6~16.6V / 31.2~33.2V
Off State Current	6mA Max
Latch Current	8mA Max
Input Cap (24V/48V)	40µF / 20µF Max

Output (P0824120)

Voltage Accuracy	±1.0%
Line Regulation	±0.2%
Load Regulation	±0.2%
Temp Drift	±0.03%/°C
Tolerance Band	±4% All Conditions
Ripple & Noise	3% Vₒ (1% RMS)
OVP	115~130% Vₒ
Current Limit	108%~125%
Trim Range	±10%
Input Ripple Rejection	-50dB @ <1KHz
Step Load (50~75%)	±3% Vₒ / Cₒ=0µF
Step Load (10~90%)	±5% Vₒ / Cₒ=100µF
Step Load (0~100%)	±3% Vₒ / Cₒ=2200µF
Start-Up Delay	20ms / 250ms

Package

Form Factor	1/8 Brick 8-Pin
Enclosure	Metal, Six-Sided
Weight	32g
Base Plate	Aluminum alloy, anode oxide
Mounting	M2 or through-hole
Max Torque	1.3 in-Ib (0.15Nm)

Pinout

Pin Configuration & Functions

Industry-standard 1/8 brick 8-pin interface. Remote control, sense lines, and trim included.

Input Side

Pin 1−INNegative input

Pin 2PCRemote control

Pin 3+INPositive input

Output Side

Pin 4+VoPositive output

Pin 5+SSense

Pin 6TRIMVoltage adjust

Pin 7−SSense

Pin 8−VoNegative output

Performance

Typical Performance

Efficiency curves, power loss, derating, and pulsed-load waveforms.

Start-up · Transient response · Ripple · Efficiency · Derating · Pulsed load — View full detail in PDF →

Mechanical

Mechanical Drawing

Standard 1/8 brick metal enclosed package with 8-pin interface. M2 mounting screws.

1/8 Brick Metal Enclosed Package — View full detail in PDF →

32g

Weight

94%

Peak Efficiency

450KHz

Switching Freq

Need a Custom Configuration?

Contact our engineering team for custom input/output voltages or application-specific pulsed-load requirements.

Contact Us →