User manual

User's Guide
SLUU510–August 2011
Non-Dimmable LED Lighting Driver Controller
1 Introduction
The TPS92001EVM-645 evaluation module is a constant-current, non-dimmable LED driver. It is designed
to drive 9 LEDs at 330 mA and is rated for an AC input of 105 V
RMS
to 135 V
RMS
.
2 Description
The TPS92001/2 family of general LED lighting PWM controllers contains control and drive circuitry
required for off-line isolated or non-isolated LED lighting applications. The TPS92001EVM-645 evaluation
module uses the TPS92001 as a non-isolated buck controller; more specifically it is an inverting buck
topology. The controller operates in fixed-frequency, current-mode switching with minimal external parts
count. In LED illumination applications there is typically no need for the LED load to be referenced to
ground. This utilizes the inverted buck which moves the controller and FET to the low side of the circuit,
referenced to the lowest voltage, while the LED load is floated (referenced to the highest voltage). With an
appropriately designed bias regulator for the controller, we can now use a much lower voltage controller
which is more economical.
2.1 Typical Applications
• Commercial/Household LED lighting
2.2 Features
• Non-Dimmable, Non-Isolated LED Driver with Minimum External Part Count
• Wide Duty Cycle Range for Wide-Input Voltage
• Convenient 5-V Reference Output
• Test Points for Output Voltage/Current
3 Electrical Performance Specifications
Table 1. TPS92001EVM-645 EVM-001 Electrical Performance Specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Input Characteristics
Voltage range 105 120 135 V
Maximum input current 115 mA
Output Characteristics
Output voltage, V
OUT
26 30 34 V
Output load current, I
OUT
290 330 370 mA
Output current ripple V
IN
= 120 V
AC
280 mApp
Output over Voltage 36 V
Systems Characteristics
Switching frequency 133 kHz
Full load efficiency V
IN
= 120 V
AC
88%
Power factor 0.87
2
Non-Dimmable LED Lighting Driver Controller SLUU510–August 2011
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