CTC DC/DC-CONVERTER

Features:

■4:1 Wide Input Range.
■3W DIP-24 Package.

■Full SMD-Design.
■High Efficiency up to 85%.
■UL94V-0 Package Material.
■Low Ripple and Noise.
■Continuous Short Circuit Protection, Auto-Restarting.
■2000Vdc Isolation min.
■Input π Filter

■Operating Temperature Range -40°C to +85°C.

■Case Temperature 38°C @ Ta=25°C

■Meet CE EN-60950-1 Certified

Note: (1) Add "H" after Order Code for isolation 4000Vdc min.

(2) Metal case could be selected with "M" after P/N

Description:

The B3WR4-xxxxA/DA series is a wide input voltage range of DC-DC converters offering a single

and dual regulated output. 24-pin DIP and high efficiency allows an operation temperature

of -40°C to +85°C.The applications include industrial system, communications equipment, battery

powered equipments etc….

Selection Guide
P/N	Input Range	Output Voltage	Output Current	Efficiency Typ.
B3WR4-243.3A B3WR4-2405A/DA B3WR4-2409A/DA B3WR4-2412A/DA B3WR4-2415A/DA	9~36VDC	3.3 5 / ±5 9 / ±9 12 / ±12 15 / ±15	850mA 600mA / ±300mA 333mA / ±167mA 250mA / ±125mA 200mA / ±100mA	78% 80% 82% 84% 85%
B3WR4-483.3A B3WR4-4805A/DA B3WR4-4809A/DA B3WR4-4812A/DA B3WR4-4815A/DA	18~72VDC	3.3 5 / ±5 9 /±9 12 / ±12 15 / ± 15	900mA 600mA / ±300mA 333mA / ±167mA 250mA / ±125mA 200mA / ±100mA	79% 81% 83% 84% 85%

Electrical Specifications
Input Filter	π type.
Voltage set accuracy		MIN.	TYP.	MAX.
Voltage set accuracy			±1%	±2%
Line Regulation	Low line to High line @ Max. load			0.3%
Load Regulation	20%~100% load			0.6%
Ripple & Noise @ 20MHz BW (Note 1)				50mVp-p
Operating Temperature		-40°C		+85°C
Storage Temperature		-50°C		+125°C
Short-Circuit Protection	Continuous, Auto Restart
Operating Frequency (Pulse Frequency Modulation , PFM)	Vin = Nominal Input	160KHZ
Isolation Test Voltage	Tested for 1 second Min	MIN.	TYP.	MAX.
Isolation Test Voltage	Tested for 1 second Min	2000Vdc
Isolation Capacity			60pF
Isolation Resistance		1GΏ
Humidity				95%
MTBF (MIL-HDBK-217F)			10⁶hours
Case Temperature	Vin = Nominal Input @ Ta= 25°C		38°C

Physical Specifications
Case Material	Non conductive Black Plastic
Potting Material	Epoxy(UL94V-0)
Weight	12.0g

All specifications valid at nominal input voltage , full load @ 25°C after warm-up time unless otherwise stated.

Outline Dimensions

Note:

1. To measure the output ripple & noise with short runs by 0.1uF/50V @ 20MHz nominal input

and full load. Please see as below :