FAN7346: LED Current Balance Controller for Lighting, 4-Channel
Description: The FAN7346 is an LED current-balance controller t...
The FAN7346 is an LED current-balance controller that controls 4-LED arrays to maintain equal LED current.
The FAN7346 has a high withstanding voltage, so is suitable for edge-type LED BLU and LED Lighting. To minimize components between primary to secondary, the FAN7346 generates a new integrated feedback signal.
The FAN7346 provides various protections, such as over-voltage regulation, open-LED protection, thermal protection, and drain-source voltage protection of regulating switch (the FAN7346 monitors all LED arrays drain-source voltage for protection). To increase system reliability, FAN7346 applies individual string protection. Because FAN7346 integrates so many functions it reduces overall BOM costs.
LED brightness can be linearly varied up to LED current by applying an external Pulse Width Modulated (PWM) signal to the PWM pin.
The FAN7346 is available in a 28-SOIC package.
Linear Balance Control for 4-Channel LED Arrays
Wide LED String Voltage Range: ≤ 100V
Wide VCC Voltage: 10.5V to 35V
External Linear Regulation Switch: MOSFET or BJT
Internal Voltage Regulator for Feedback
Monitoring Drain-Source Voltage of External Switch
Precision Current Accuracy Trimmed to 1.5%
Supports External PWM Dimming - Positive
Supports Wide Dimming Ratio: 0.5%~100%
Adaptive Linear Regulation Method
Generate Integrated Feedback Signal for Primary Controller (Current Feedback + PWM Dimming)
High Efficiency by Primary Side Direct Feedback
Thermal Shutdown (Auto-Recovery)
Channel Individual Short-LED Protection
Channel Individual Open-LED Protection
Error Flag Output
Channel Individual Over-Current Protection
Technical Documentation & Design Resources
Availability and Samples
Compliance: Pb-free Halide free
Description: LED Current Balance Controller for Lighting, 4-Channel
Package Type: SOIC-28W
Package Case Outline: 751BM
Container Type: REEL
Container Qty: 1000
Market Leadtime (weeks):2 to 4
LED String Current Controller
VI Min (V):
VI Max (V):
100 VDC - VCH1/2/3/4
VO Max (V):
17 - VOUT
IO Max (mA):
150/500 - Isource/sink
fSW Typ (kHz):