Low EMI Automotive LED Driver with 4-, 3- Channels, SGM37440Q Replace LP8867.
SGM37440Q.pdfCROSS
FEATURES
• AEC-Q100 Qualified for automotive applications:
– Device temperature grade 1:
–40°C to +125°C, TA
• Functional safety capable
– Documentation available to aid functional
safety system design
• 3-, 4-Channel 120-mA current sinks
– High dimming ratio of 10 000:1 at 100 Hz
– Current matching 1% (typical)
– LED String current up to 120 mA per channel
– Outputs can be combined externally for higher
current per string
• Integrated boost and SEPIC converter for LED
string power
– Input voltage operating range 4.5 V to 40 V
– Output voltage up to 45 V
– Integrated 3.3-A Switch FET
– Switching frequency 300 kHz to 2.2 MHz
– Switching synchronization input
– Spread spectrum for lower EMI
• Fault detection and protection
– Fault output
– Input voltage OVP, UVLO and OCP
– Boost block SW OVP and output OVP
– LED open and short fault detection
– Power-Line FET control for battery bus protection
– Automatic LED current reduction with external
temperature sensor
– Thermal shutdown
PIN CONFIGUTION
