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Hello, Please ask a question about MP3373 Datasheet
# Example questions:
➢ Besides pwm dimming, what other method is described in the quick start guide for controlling the brightness of the leds, and what voltage range is recommended for this method?
➢ What is the recommended input voltage range for the mp3373, according to the quick start guide?
➢ The bill of materials lists multiple resistors with the yageo rc0603fr-0710rl part number. what is the resistance value of these resistors?
| Part No. | MP3373 |
| Manufacturer | MPS |
| Size | 613 Kbytes |
| Pages | 7 pages |
| Description | 8 Strings, Step Up WLED Controller with External Transistor |
1. Overview
️· Product: MP3373GM LED Driver.
️· Documentation: Evaluation Board (EVB) documentation, including bill of materials (BOM), schematics, and layout information.
️· Purpose: The EVB is designed to demonstrate the functionality of the MP3373GM LED driver IC.
️· Operating Conditions (Testing): V<sub>IN</sub> = 18V, 10 LEDs in series, 8 strings parallel, 200mA/string, T<sub>A</sub> = 25°C.
2. Key Components (from the BOM)
️· U1 (MP3373GM): The LED driver IC itself.
️· L1: Inductor (47µH) - Part of the power conversion circuit.
️· M1: N-Channel MOSFET - Used in the power switching stage.
️· Q1-Q8: PNP Transistors - Used in the LED string control
️· D1 & D2: Schottky Diodes - For freewheeling and rectification.
️· F1: Fuse (4A, 63V) - For circuit protection.
️· Resistors: Various resistors (0Ω, 10Ω, 20kΩ, etc.) - for voltage dividers, current limiting, and biasing.
️· Capacitors: Various capacitors (ceramic and electrolytic) for filtering and decoupling.
️· LEDs: The test circuit uses 10 LEDs in series, 8 strings.
3. Testing & Performance
️· Purpose of Test: The provided test results are to demonstrate the functionality of the MP3373GM under specific operating conditions.
️· Conditions:
- Input Voltage (V<sub>IN</sub>): 18V
- LED Configuration: 10 LEDs in series per string, 8 strings in parallel.
- Current per String: 200mA
- Ambient Temperature (T<sub>A</sub>): 25°C
️· Dimming Options:
- PWM Dimming: Apply a PWM signal with a voltage between 0.3V (minimum) and 1.6V (maximum) to the EN/PWM pin or DIM pin. Recommended PWM frequency is between 200Hz and 2kHz. If using the EN/PWM pin for PWM, the DIM pin needs to be pulled high.
- Analog Dimming: Apply a DC voltage between 0.4V and 1.5V to the DIM pin.
4. Quick Start Guide
1. Connect the load panel (8 strings of 10 LEDs in series) to the EVB's LED+ and LED-1~8 pins.
2. Connect a power supply (9V to 28V) to the VIN and GND pins.
3. Enable the MP3373GM by driving the EN pin high (5V).
4. For PWM dimming, apply a PWM signal or for Analog dimming, apply a DC voltage to the appropriate dimming pin.
Important Notes (from the documentation):
️· Legal Disclaimer: Users are responsible for ensuring their applications don't infringe on intellectual property rights. MPS is not liable for any issues arising from such infringement.
️· Documentation Subject to Change: The information is subject to change without notice.
1. Overview
️· Product: MP3373GM LED Driver.
️· Documentation: Evaluation Board (EVB) documentation, including bill of materials (BOM), schematics, and layout information.
️· Purpose: The EVB is designed to demonstrate the functionality of the MP3373GM LED driver IC.
️· Operating Conditions (Testing): V<sub>IN</sub> = 18V, 10 LEDs in series, 8 strings parallel, 200mA/string, T<sub>A</sub> = 25°C.
2. Key Components (from the BOM)
️· U1 (MP3373GM): The LED driver IC itself.
️· L1: Inductor (47µH) - Part of the power conversion circuit.
️· M1: N-Channel MOSFET - Used in the power switching stage.
️· Q1-Q8: PNP Transistors - Used in the LED string control
️· D1 & D2: Schottky Diodes - For freewheeling and rectification.
️· F1: Fuse (4A, 63V) - For circuit protection.
️· Resistors: Various resistors (0Ω, 10Ω, 20kΩ, etc.) - for voltage dividers, current limiting, and biasing.
️· Capacitors: Various capacitors (ceramic and electrolytic) for filtering and decoupling.
️· LEDs: The test circuit uses 10 LEDs in series, 8 strings.
3. Testing & Performance
️· Purpose of Test: The provided test results are to demonstrate the functionality of the MP3373GM under specific operating conditions.
️· Conditions:
- Input Voltage (V<sub>IN</sub>): 18V
- LED Configuration: 10 LEDs in series per string, 8 strings in parallel.
- Current per String: 200mA
- Ambient Temperature (T<sub>A</sub>): 25°C
️· Dimming Options:
- PWM Dimming: Apply a PWM signal with a voltage between 0.3V (minimum) and 1.6V (maximum) to the EN/PWM pin or DIM pin. Recommended PWM frequency is between 200Hz and 2kHz. If using the EN/PWM pin for PWM, the DIM pin needs to be pulled high.
- Analog Dimming: Apply a DC voltage between 0.4V and 1.5V to the DIM pin.
4. Quick Start Guide
1. Connect the load panel (8 strings of 10 LEDs in series) to the EVB's LED+ and LED-1~8 pins.
2. Connect a power supply (9V to 28V) to the VIN and GND pins.
3. Enable the MP3373GM by driving the EN pin high (5V).
4. For PWM dimming, apply a PWM signal or for Analog dimming, apply a DC voltage to the appropriate dimming pin.
Important Notes (from the documentation):
️· Legal Disclaimer: Users are responsible for ensuring their applications don't infringe on intellectual property rights. MPS is not liable for any issues arising from such infringement.
️· Documentation Subject to Change: The information is subject to change without notice.
| Part No. | MP3373 |
| Manufacturer | MPS |
| Size | 613 Kbytes |
| Pages | 7 pages |
| Description | 8 Strings, Step Up WLED Controller with External Transistor |
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