TLD5095EL Datasheet, PDF (3/31 Pages) Infineon Technologies AG – DC/DC Boost, Buck-Boost, SEPIC controller

DC/DC Boost, Buck-Boost, SEPIC controller
TLD5095EL
TLD5095EL
1
Overview
Features
• Wide Input Voltage Range from 4.75 V to 45 V
• Constant Current or Constant Voltage Regulation
• Drives LEDs in Boost (B2G), Buck-Boost (B2B) and SEPIC Topology
• Very Low Shutdown Current: IQ< 10 µA
• Flexible Switching Frequency Range, 100 kHz to 500 kHz
• Synchronization with external clock source
• Output Open Circuit Diagnostic Output
• PWM Dimming
• Internal Soft Start
PG-SSOP-14 (e-Pad)
• 300mV High Side Current Sense to ensure highest flexibility and LED current accuracy
• Internal 5 V Low Drop Out Voltage Regulator
• Wide LED current range via simple adaptation of external components
• Available in a small thermally enhanced PG-SSOP-14 (e-Pad) package
• Output Overvoltage Protection
• Over Temperature Shutdown
• Automotive AEC Qualified
• Green Product (RoHS) Compliant
Description
The TLD5095EL is a smart LED boost controller with built in protection and diagnostic features. The main function of
this device is to regulate a constant LED current. The constant current regulation is especially beneficial for LED color
accuracy and longer lifetime. The controller concept of the TLD5095EL allows a multi-purpose usage such as Boost,
Buck-Boost and SEPIC configuration with various load current levels by simply adjusting the external components. The
TLD5095EL has a PWM output for dimming a LED load. The diagnostics are communicated on a status output (pin ST)
to indicate a fault condition such as an LED open circuit. The switching frequency is adjustable in the range of 100 kHz
to 500 kHz and can be synchronized to an external clock source. The TLD5095EL features an enable function reducing
the shut-down current consumption to <10 µA. The current mode regulation scheme of this device provides a stable
regulation loop maintained by small external compensation components. The integrated soft-start feature limits the
current peak as well as voltage overshoot at start-up. This IC is suited for use in the harsh automotive environments
and provides protection functions such as output overvoltage protection and overtemperature shutdown.
Applications
• Automotive Exterior Lighting (Brake Light, Tail Light, Fog Light, CHMSL, Daytime Running Light, Position
Light, Turn Indicators)
• Automotive Interior Lighting (Reading Light, Dome Light, Display Backlighting)
Type
TLD5095EL
Datasheet
Package
PG-SSOP-14 (e-Pad)
3
Marking
TLD5095
Rev. 1.1, 2009-12-16