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Introduction
2
1 Introduction
The Texas Instruments TPS60230EVM-047 evaluation module (EVM) helps
designers evaluate the operation and performance of the TPS60230. This de-
vice is an efficient charge-pump-based current sink that can drive up to five
white LEDs with 25mA each. Efficiency is improved by switching between a
1.0x and 1.5x mode, based on the input voltage.
This EVM is specifically designed and optimized to operate with a single-cell
Li-Ion battery input. The default maximum current setting for this EVM is 20mA
per LED. If desired, this EVM can easily be modified to supply higher or lower
currents by appropriately selecting the ISET resistor, R1. Refer to the data
sheet (SLVS516) for more information on adjusting the LED current.
2 Initial Configuration
This section describes the jumpers and connectors on the EVM, as well as how
to properly connect, set up, and use the TPS60230EVM-047.
2.1 Input/Output Connector Descriptions
2.1.1 J1: VIN
This is the positive connection to the input power supply or battery.
2.1.2 J2: GND
This is the return connection for the input power supply or battery.
2.1.3 JP1: EN2
This jumper will ground the EN2 pin or connect it to VIN. If the both EN1 and
EN2 are connected to VIN, the LED current will be the full programmed value
set by R1. For this EVM, that current is 20mA. If EN2 is connected to ground
and EN1 is high, the LED current will be set to 1/3 the programmed value, or
6.66mA. If both EN1 and EN2 are grounded, the LEDs will turn off.
2.1.4 JP2: EN1
This jumper will ground the EN1 pin or connect it to VIN. If the both EN1 and
EN2 are connected to VIN, the LED current will be the full programmed value
set by R1. For this EVM, that current is 20mA. If EN1 is connected to ground
and EN2 is high, the LED current will be set to 2/3 the programmed value, or
13.33mA. If both EN1 and EN2 are grounded, the LEDs will turn off.