B0503S-1WR3

Part: B_S-1WR3 Series — Guangzhou Guantuo Electronic Technology Co., Ltd.

Type: Isolated Unregulated DC-DC Converter

Description: 4.5–5.5VDC input, 0.1–1W isolated unregulated single output DC-DC converter with 1500VDC isolation.

Operating Conditions:

• Supply voltage: 4.5–5.5VDC
• Operating temperature: -40 to +85 °C
• Output power: 0.1W to 1W

Absolute Maximum Ratings:

• Max storage temperature: +105 °C

Key Specs:

• Output Voltage Accuracy: -7.5% to +2.5% (Nominal voltage input, 100% load)
• Load Regulation: Typ. 15%, Max 20% (10%-100% Load)
• Line Regulation: Typ. ±1%, Max ±1.5% (Input voltage variation ±1%, 100% load)
• Output Ripple & Noise: Typ. 75mV, Max 100mV (20MHz bandwidth, output 3.3–12VDC)
• Output Ripple & Noise: Typ. 100mV, Max 200mV (20MHz bandwidth, output 15–24VDC)
• Switching Frequency: Typ. 100kHz
• Isolation Voltage: 1500VDC (Input to output, test 60s, ≤0.5mA)
• Isolation Resistance: 1000MΩ (Input to output, 500VDC)

Features:

• International standard package, saving PCB installation space
• High efficiency, low ripple and noise
• Input and output isolation
• No external components required, small size, high power density
• Continuous short-circuit protection, self-recovery

Applications:

• Isolated power supply in distributed power systems such as low-frequency analog circuits
• Relay drive circuits
• Data exchange circuits

Package:

• International standard package (2.54 mm x 2.54 mm grid spacing)

• 1. International standard package, saving PCB installation space
• 1. High efficiency, low ripple and noise
• 1. Input and output isolation
• 1. No external components required, small size, high power density
• 1. Used as an isolated power supply in distributed power systems such as low-frequency analog circuits, relay drive circuits, and data exchange circuits.
• 1. Continuous short-circuit protection, self-recovery

• [1] For applications with high ripple and noise requirements, an external LC filter circuit should be connected.
• [2] The capacitance of the external capacitor Cout at the output should not be too large, otherwise it may cause overcurrent or poor startup during module startup, leading to module damage. Selection should be made according to the table below.