Diodes' AL1673 is a high performance single stage flyback/buck-Boost converter targeting dimmable LED lighting application. It operates at boundary conduction mode (BCM) mode which results in good EMI and efficiency.
The AL1673 can support multiple dimming modes. When a 0.3 VDC to 2.4 VDC signal is applied on APWM pin, the device will operate in analog dimming mode. When a digital signal is applied on APWM pin, the device works at PWM dimming mode.
The AL1673 features low start-up current and low operation current. It integrates multiple protections including over-voltage, short-circuit, over-current, and over temperature protection. It also integrates 600 V/2 A high voltage MOSFET.
The AL1673 is available in SO-8EP package.
Diodes Advantage
The AL1673 is a high-performance single-stage converter with built-in MOSFET for PWM/analog dimming applications.
- Highly-integrated converter in SO-8EP package: low BOM cost solution
- Built-in 2 A/600 V MOSFET: small size and simple circuit design
- Supports both PWM and analog dimming: can be dimmed by a PWM signal or a DC voltage
- SO-8EP package: better thermal performance
- High PF and low THD: PF > 0.9, THD < 20%
- Built-in undervoltage lock-out, output open-circuit protection, output over-voltage protection, output short-circuit protection, thermal foldback protection, and over-temperature shutdown: provides a complete protection function
Features |
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- Valley switching for low switching loss
- Low start-up current
- High PF and low THD
- High efficiency
- Tight LED current variation range
- Tight output open voltage variation range
- Integrates 600 V/2 A MOSFET
- Support both PWM dimming and analog dimming
- PWM dimming range: 3% to 100% at 1 kHz PWM frequency
- Analog dimming and PWM-to-DC dimming range: 18% to 100%
- Low system cost
Applications
- General LED lighting drivers with dimming function
- General purpose constant current sources
- Smart LED lighting
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- Internal protections
- Under voltage lock out (UVLO)
- Output over voltage protection (OVP)
- Output short protection (OSP)
- Over current protection (OCP)
- Thermal fold-back protection (TFP)
- Over temperature protection (OTP)
- Package: SO-8EP
- Totally lead-free and fully RoHS compliant
- Halogen- and antimony-free; "green" device
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