TP8005

TP8005 is a step-down LED constant current driver operating in continuous inductor current mode, designed to efficiently drive one or more series-connected LEDs. The input voltage range is 5V to 36V, with an externally adjustable output current of up to 1.2A. TP8005 integrates an internal power transistor and employs a high-side current sensing scheme. The average LED output current can be set via an external resistor, and the DIM pin accepts both analog dimming and PWM dimming signals over a wide range. When the DIM pin voltage falls below 0.3V, the internal power transistor turns off and TP8005 enters a low-power standby mode. TP8005 integrates an automatic temperature compensation control circuit. When the internal junction temperature exceeds 130°C, the LED output current gradually decreases as temperature rises, eventually stabilizing at a certain current level — eliminating the low-frequency LED flicker caused by conventional over-temperature protection. When the internal temperature rises to 150°C, the LED output current reduces to zero.

Applications

• Low-voltage LED spotlight replacement for halogen lamps
• Low-voltage industrial LED lighting
• LED decorative lighting
• Other LED lighting

Key features

• Up to 95% efficiency
• Automatic temperature compensation control
• Wide input voltage range: 5V~36V
• Maximum 1.2A output current
• DIM pin supports PWM and analog dimming
• ±3% output current accuracy
• Built-in LED open-circuit protection
• Adjustable soft-start time
• SOT89-5L / SOT23-5L package