TLD5098EL Datasheet, PDF (3/39 Pages) Infineon Technologies AG – DC/DC Boost, Buck-Boost, SEPIC controller

DC/DC Boost, Buck-Boost, SEPIC controller
TLD5098EL
TLD5098EL
1
Overview
Features
• Wide Input Voltage Range from 4.5 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: I_{q_OFF} < 10 µA
• Flexible Switching Frequency Range, 100 kHz to 500 kHz
• Synchronization with external clock source
• PWM Dimming
• Analog Dimming feature to adjust average LED current
• Internal 5 V Low Drop Out Voltage Regulator
PG-SSOP-14
• Open Circuit Detection
• Short to GND Protection
• Output Overvoltage Protection
• Internal Soft Start
• Over Temperature Shutdown
• Wide LED current range via simple adaptation of external components
• 300mV High Side Current Sense to ensure highest flexibility and LED current accuracy
• Available in a small thermally enhanced PG-SSOP-14 package
• Automotive AEC Qualified
• Green Product (RoHS) Compliant
Description
The TLD5098EL is a LED boost controller with built in protection 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 TLD5098EL allows multiple configurations such as Boost,
Buck/Boost and SEPIC by simply adjusting the external components. The TLD5098EL offers the most flexible
dimming options. Dimming can be achieved with analog or PWM input.The switching frequency is adjustable in
the range of 100 kHz to 500 kHz and can be synchronized to an external clock source. The TLD5098EL features
an enable function reducing the shut-down current consumption to I_{q_OFF} < 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 output overvoltage protection, device overtemperature
shutdown and short circuit to GND protection.
Applications
• Automotive Exterior and Interior Lighting
Type
TLD5098EL
Datasheet
Package
PG-SSOP-14
3
Marking
TLD5098
Rev. 1.0, 2010-10-13