Texas Instruments Synchronous Buck Controllers for Precision Dimming LED Drive Evaluation Module TPS92641EVM TPS92641EVM 데이터 시트
제품 코드
TPS92641EVM
Connector Descriptions
4
Connector Descriptions
The connector descriptions for this EVM are illustrated in
Figure 2. TPS92641EVM Connector Descriptions
4.1
Input Connections
The Input terminals of the TPS92641EVM are described in
to
.
4.1.1
VIN (J1)
The VIN terminal of J1 connector is the positive input terminal of the supply voltage to the EVM.
4.1.2
GND (J1)
The GND terminal of the J1 connector is the ground input terminal of the supply voltage to the EVM.
4.1.3
UDIM (TP2)
The UDIM terminal is the input terminal of the standard PWM dimming control signal to the device. This is
the default dimming scheme of the EVM and accepts logic level PWM control signal.
the default dimming scheme of the EVM and accepts logic level PWM control signal.
4.1.4
SDIM (TP3)
The SDIM terminal is the input terminal of the high-speed shunt FET PWM dimming control signal to the
device. In order to use this feature, install Q3. Please also note that standard PWM dimming (UDIM)
cannot be used with Q3 installed. Again, this input accepts the logic level PWM control signal.
device. In order to use this feature, install Q3. Please also note that standard PWM dimming (UDIM)
cannot be used with Q3 installed. Again, this input accepts the logic level PWM control signal.
4.1.5
IADJ (TP8)
The IADJ terminal is the input of analog dimming control voltage. With R5 removed and C9 installed, the
LED current can be controlled by the DC voltage level at IADJ terminal directly. The range of this control
voltage is up to about 2 V with this EVM. True Zero LED current dimming can be achieved by installing
R11 in place to off-set the zero LED current point.
LED current can be controlled by the DC voltage level at IADJ terminal directly. The range of this control
voltage is up to about 2 V with this EVM. True Zero LED current dimming can be achieved by installing
R11 in place to off-set the zero LED current point.
5
SLVU823 – December 2012
User's Guide for the TPS92641EVM
Copyright © 2012, Texas Instruments Incorporated