str-a6251d Allegro MicroSystems, Inc., str-a6251d Datasheet
str-a6251d
Related parts for str-a6251d
str-a6251d Summary of contents
Page 1
... They incorporate a primary control and drive circuit with avalanche-rated power MOSFETs. The STR-A6252 features higher allowable switching current and lower on-resistance. The STR-A6251D is also available for 67 kHz operation. Covering the power range from below 21 watts or 24 watts for a 230 VAC input watts for a universal (85 ...
Page 2
... STR-A6251D and STR-A6252D Universal-Input/ kHz Flyback Switching Regulators Features and Benefits (continued) Automatic Burst Stand-By (intermittent operation) ▪ Input Power <0 Load Auto-Bias Function ▪ Stable Burst Operation Without Generating Interference Internal Off-Timer Circuit ▪ Built-In Constant-Voltage/Constant Current ▪ Multiple Protections: ▪ ...
Page 3
... STR-A6251D and STR-A6252D Universal-Input/ kHz Flyback Switching Regulators Operating Ambient Temperature ........ -20°C to +100°C Operating Junction Temperature ........ -20°C to +125°C Maximum Frame Temperature ......................... +115°C For the availability of parts meeting -40°C requirements, contact Allegro’s Sales Representative. 3 Maximum Allowable Power Dissipation ...
Page 4
... OVP/TSD Latch Release Voltage Thermal Shutdown Thermal Resistance Typical values are given for circuit design information only. Negative current is defi ned as coming out of (sourcing) the specifi ed terminal. www.allegromicro.com STR-A6251D and STR-A6252D = 25° (unless otherwise specifi ed Pin No ...
Page 5
... STR-A6251D and STR-A6252D Universal-Input/ kHz Flyback Switching Regulators STR-A6251D Avalanche energy is measured mH 2 MOSFET TYPICAL CHARACTERISTICS = 99 V, Avalanche energy is measured 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 STR-A6252D = mH 3 ...
Page 6
... Precautions must be taken to prevent accidental contact with power-line potentials. Do not connect grounded test equipment. The use of an isolation transformer is recommended during circuit development and breadboarding. www.allegromicro.com STR-A6251D and STR-A6252D Universal-Input/ kHz Flyback Switching Regulators STR-A6251D STR-A6252D ...
Page 7
... STR-A6251D and STR-A6252D Universal-Input/ kHz Flyback Switching Regulators Typical Application NOTE: The start-up performance of the IC can only be guaranteed for values of C2 greater than 22 μF. This value is required to keep the internal supply voltage within regu- lation during IC initialization. The products described herein are manufactured in Japan by Sanken Electric Co ...
Page 8
... STR-A6251D and STR-A6252D Universal-Input/ kHz Flyback Switching Regulators PACKAGE DIMENSIONS Dimensions in Inches Dimensions in Millimeters (controlling dimensions) Terminal Finish: Pure Sn, 2 Product Weight: Approx. 0.51 g. Frame temperature For more effi cient heat radiation, connect a broad PCB pattern at pins 7 and 8. (for reference only) level interconnect category (e3) ...
Page 9
... Sanken Electric Korea Co., Ltd. Samsung Life Yeouido Building 16F 23-10, Yeouido-Dong, Yeongdeungpo-gu Seoul 150-734, Korea Tel: 82-2-714-3700, Fax: 82-2-3272-2145 www.allegromicro.com STR-A6251D and STR-A6252D Universal-Input/ kHz Flyback Switching Regulators Worldwide Contacts Singapore Sanken Electric Singapore Pte. Ltd. 150 Beach Road, #14-03 The Gateway West ...