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STR-A6159 Dataheets PDF



Part Number STR-A6159
Manufacturers Allegro Microsystems
Logo Allegro Microsystems
Description (STR-A6151 / STR-A6159) Universal Input / 13 or 16W Flyback Switching Regulator
Datasheet STR-A6159 DatasheetSTR-A6159 Datasheet (PDF)

g n i h tors c t i a Sw egul R STR-A6151 AND STR-A6159 Universal-Input/13 or 16 W Flyback Switching Regulators The STR-A6151 and STR-A6159 are PRC topology (fixed off-time) regulators specifically designed to satisfy the requirements for increased integration and reliability in flyback converters. They incorporate a primary control and drive circuit with avalanche-rated power MOSFETs. The STR-A6151 features higher switching current and avalanche-energy ratings and lower on-resistance. Covering.

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g n i h tors c t i a Sw egul R STR-A6151 AND STR-A6159 Universal-Input/13 or 16 W Flyback Switching Regulators The STR-A6151 and STR-A6159 are PRC topology (fixed off-time) regulators specifically designed to satisfy the requirements for increased integration and reliability in flyback converters. They incorporate a primary control and drive circuit with avalanche-rated power MOSFETs. The STR-A6151 features higher switching current and avalanche-energy ratings and lower on-resistance. Covering the power range from below 13 watts to 16 watts for a 230 VAC input, or 10 to 12 watts for a universal (85 to 264 VAC) input, these devices can be used in a range of applications, from DVD and VCR players to ac adapters for cellular phones and digital cameras. An auto-standby function reduces power consumption at light load, while multiple protections, including the avalanche-energy guaranteed MOSFET, provide high reliability of system design. Cycle-by-cycle current limiting, undervoltage lockout with hysteresis, overvoltage protection, and thermal shutdown protect the power supply during the normal overload and fault conditions. Overvoltage protection and thermal shutdown are latched after a short delay. The latch may be reset by cycling the input supply. Low start-up current and a low-power standby mode selected from the secondary circuit completes a comprehensive suite of features. Both devices are provided in an 8-pin mini-DIP plastic package. Data Sheet 28103.22* ABSOLUTE MAXIMUM RATINGS at TA = +25°C Control Supply Voltage, VCC . . . . 35 V Drain-Source Voltage, VDSS . . . . . . 650 V Drain Switching Current, ID STR-A6151 . . . . . . . . . . . . . . 2.5 A* STR-A6159 . . . . . . . . . . . . . . 1.8 A* Peak Drain Switching Current, IDM STR-A6151 . . . . . . . . . . . . . . . 2.5 A STR-A6159 . . . . . . . . . . . . . . . 1.8 A Single-Pulse Avalanche Energy, EAS STR-A6151 . . . . . . . . . . . . . . 72 mJ STR-A6159 . . . . . . . . . . . . . . 24 mJ Start-Up-Pin Voltage Range, Vstartup . . . . . . . . . –0.3 V to +600 V OCP Voltage Range, VOCP . . . . . . . . . . . . –0.5 V to +6 V FB/OLP Voltage Range, VFB/OLP . . . . . . . . . . –0.5 V to +10 V Package Power Dissipation, PD control (VCC × ICC(ON)) . . . . . 0.15 W MOSFET (VDSS × ID) . . . . . . 1.35 W total . . . . . . . . . . . . . . . . . . . . 1.5 W MOSFET Channel Temp., TJ . +150°C Internal Frame Temp., TF . . . . +125°C Operating Temperature Range, TA . . . . . . . . . . . -20°C to +125°C† Storage Temperature Range, TS . . . . . . . . . . . . -40°C to +125°C w w .D w t a S a e h t e U 4 .c m o FEATURES AND BENEFITS ■ Rugged 650 V Avalanche-Rated MOSFET Simplified Surge Absorption No VDSS Derating Required ■ Choice of rDS(on) (3.95 Ω or 6 Ω maximum) ■ Two Operational Modes by Automatic Switching: PRC Mode for Normal Operation Burst Mode for Stand-By Operation or Light Loads ■ Built-In Leading Edge Blanking ■ Low Start-Up Current Start-Up Circuit Disabled in Operation ■ Low Operating Current (1.5 mA typ) ■ Automatic Burst Stand-By (intermittent operation) Input Power <0.1 W at No Load — continued * Drain switching current is limited by temperature (page 2) and safe operating area (page 4). †For the availability of parts meeting -40°C requirements, contact Allegro’s Sales Representative. Always order by complete part number, e.g., STR-A6151 . Sanken Power Devices from Allegro MicroSystems w w w .D a S a t e e h U 4 t m o .c STR-A6151 and STR-A6159 Universal-Input/13 or 16 W Flyback Switching Regulators FUNCTIONAL BLOCK DIAGRAM g n i h tors c t i a Sw egul R FEATURES AND BENEFITS (cont’d) ■ Auto-Bias Function Stable Burst Operation Without Generating Interference ■ Internal Off-Timer Circuit ■ Built-In Constant-Voltage Drive ■ Multiple Protections: Pulse-by-Pulse Overcurrent Protection Overload Protection with Auto Recovery Latching Overvoltage Protection Undervoltage Lockout with Hysteresis Latching Thermal Shutdown ■ Molded Small-Size 8-Pin Package For Low-Height SMPS Polarized to Prevent Backwards Assembly 2 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 Copyright © 2005 Allegro MicroSystems, Inc. g n i h tors c t i a Sw egul R Pin Characteristic Drain-to-Source Breakdown Volt. Drain Leakage Current On-State Resistance MOSFET Switching Time Operation Start Voltage Operation Stop Voltage Circuit Current in Operation Circuit Current in Non-Operation Auto-Bias Threshold Voltage VCC(bias) - VCC(OFF) Maximum OFF Time OCP Threshold Voltage Leading Edge Blanking Time Burst Threshold Voltage OLP Threshold Voltage Current at OLP Operation Maximum FB Current Start-Up Current Start-Up Circuit Leakage Current OVP Operation Voltage OVP/TSD Latch Sustaining Current OVP/TSD Latch Release Voltage Thermal Shutdown Thermal Resistance No. 8-1 8-1 8-1 8 2 2 2 2 2 8 1 8 4 4 4 4 5 5 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Symbol V(BR)DSS I DSS STR-A6151 and STR-A6159 Universal-Input/13 or 16 W Flyback Switching Regulators ELEC.


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