Covering the power range from below 8 watts for a 230 VAC input, or 5 watts for a universal (85 to 264 VAC) input, this device 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. Devices with an increased output power rating are the STR-A6151 and STR-A6159.
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. The STR-A6169 is provided in an 8- pin mini-DIP plastic package.
FEATURES AND BENEFITS
■ Rugged 800 V Avalanche-Rated MOSFET Simplified Surge Absorption No VDSS Derating Required
■ 19.2 Ω rDS(on)
■ 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
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
Feature
- Current Mode Type Pulse Ratio Control
- Auto Standby Function Normal Operation：PRC Mode Standby：Burst Oscillation Mode
- No Load Power Consumption < 40mW
- Leading Edge Blanking Function
- Auto Bias Function
- Protections Overcurrent Protection(OCP): pulse-by-pulse Overload Protection(OLP): auto-restart Overvoltage Protection(OVP): latched shutdown Thermal Shutdown Protection(TSD): latched shutdown
Applications
- White goods
- Auxiliary SMPS
- Low power SMPS, etc.
