Diodes Incorporated AL17150-10BS7-13

Overview

AL17150-10BS7-13 from Diodes Incorporated is a universal-input (85–265 VAC), high-voltage step-down switching regulator IC with integrated 500 V/1 A MOSFET, delivering up to 300 mA output current, <50 mW no-load power consumption, and ±4% feedback voltage tolerance (V_FB = 2.5 V). It enables compact, low-BOM offline power supplies for IoT-connected LED lighting and microcontroller auxiliary rails without optocouplers.

For engineers reviewing the AL17150-10BS7-13 datasheet, AL17150-10BS7-13 pinout, AL17150-10BS7-13 application, or AL17150-10BS7-13 equivalent, key selection criteria include its SO-7 package integration, internal HV MOSFET capability, CV regulation accuracy, thermal shutdown threshold (+150 °C), and EMI-suppressing frequency modulation - all critical for cost-sensitive, space-constrained AC/DC converters.

Technical Context

The AL17150-10BS7-13 implements a primary-side constant-voltage buck controller with adaptive peak-current limiting and variable-frequency operation: peak current drops from 600 mA at full load to ~413 mA at light load, while switching frequency decreases to improve light-load efficiency. Its internal 500 V MOSFET eliminates external HV switch requirements.

It uses a single-winding inductor topology with feedback derived from an RC-sampled output voltage, enabling optocoupler-free regulation. Protection logic includes open-loop detection (V_FB < 60 mV), overload protection with 170 ms delay at 36 kHz, and latch-off recovery via V_CC restart at 4.5 V after fault clearance.

Key Specifications

Pinout & Package

AL17150-10BS7-13 is housed in a 7-pin SOIC package (SO-7) with gull-wing leads, RoHS-compliant and halogen-free. Pins 1 and 2 are NC; pins 3 and 4 share the internal MOSFET source node (S), serving as ground reference for V_CC and FB; pin 5 is V_CC bypass; pin 6 is FB feedback input; pin 7 is the high-voltage drain terminal.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage buck controller applications.

Compared with AL17150-10BS7-13, AP3917D offers higher reliability and lower no-load loss in identical form factor, while BP57722 trades integration for flexibility and higher voltage headroom - making AL17150-10BS7-13 optimal for cost-driven, volume IoT lighting where 300 mA and 500 V are sufficient.

Availability

AL17150-10BS7-13 is available at Aetrix Electronics and suitable for IoT-connected lighting, home appliance control boards, and industrial PLC input modules requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for AL17150-10BS7-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AL17150-10BS7-13 belongs to Diodes' high-voltage AC/DC controller product line, engineered specifically for cost-sensitive, non-isolated offline power conversion in smart lighting and appliance markets.

FAQ

What is the recommended minimum off-time for stable operation?

The AL17150-10BS7-13 specifies a typical minimum off-time (t_MINOFF) of 15.5 µs under normal operation, increasing to 60 µs during soft-start. This value ensures sufficient demagnetization time for the buck inductor and prevents sub-harmonic oscillation. Designers must select inductance and output capacitance such that t_ON remains above the 250 ns leading-edge blanking window and t_OFF never falls below 15.5 µs at maximum load.

Can AL17150-10BS7-13 be used without an auxiliary V_CC supply?

Yes - the IC integrates a high-voltage startup current source that charges the V_CC capacitor directly from the rectified input. An auxiliary V_CC supply (e.g., resistor from output to V_CC) is optional and only needed to achieve <50 mW no-load power; without it, standby power rises to ~75 mW due to continuous HV charging current. The datasheet confirms reliable startup and regulation using only the internal HV supply.

How does overload protection trigger and recover?

Overload protection activates when the FB voltage drops below 1.7 V (V_{FB_OLP}) for longer than the delay time t_OLP, which is 170 ms at 36 kHz and scales inversely with actual switching frequency. Upon trigger, the IC stops switching and enters latch-off mode. Recovery occurs automatically once the fault clears and V_CC discharges to 4.5 V, allowing the internal HV regulator to recharge the V_CC capacitor and restart the cycle - no external reset is required.

Is AL17150-10BS7-13 suitable for designs requiring safety isolation?

No - the AL17150-10BS7-13 is a non-isolated buck controller with primary-side regulation only. It lacks reinforced insulation, creepage/clearance compliance for SELV separation, or certification for isolated topologies (e.g., flyback). For safety-isolated applications, a secondary-side controller or certified isolated DC/DC module must be used upstream or downstream; this device is intended strictly for non-isolated auxiliary rails where user-accessible parts are fully enclosed and double-insulated.