Datasheet
TLV62130
PVIN
AVIN
EN
SS/TR
DEF
FSW
SW
VOS
PG
FB
AGND
PGND
2.2µH
(4 .. 12)V
10uF
680k
10uF
3.3nF
130k
22uF
-5V
maxINOUTIN
VVV £+
TRSSFB
RAV
/
.. ××= m52640
22uF
4.7uF
2.2µH(4 .. 17) V
0.1R187k
ADIM
PVIN
AVIN
EN
SS/TR
DEF
FSW
SW
VOS
PG
FB
AGND
PGND
TLV62130
TLV62130, TLV62130A
www.ti.com
SLVSB74B –FEBRUARY 2012–REVISED JUNE 2013
Application Example As Power LED Supply
The TLV62130 can be used as a power supply for power LEDs. The FB pin can be easily set down to lower
values than nominal by using the SS/TR pin. With that, the voltage drop on the sense resistor is low to avoid
excessive power loss. Since this pin provides 2.5µA, the feedback pin voltage can be adjusted by an external
resistor per Equation 15. This drop, proportional to the LED current, is used to regulate the output voltage (anode
voltage) to a proper level to drive the LED. Both analog and PWM dimming are supported with the TLV62130.
Figure 41 shows an application circuit, tested with analog dimming:
spacing
Figure 41. 3A Single LED Power Supply
The resistor at SS/TR sets the FB voltage to a level of about 300mV and is calculated from Equation 15.
spacing
(15)
spacing
The device now supplies a constant current, set by the resistor at the FB pin, by regulating the output voltage
accordingly. The minimum input voltage has to be rated according the forward voltage needed by the LED used.
More information is available in the Application Note SLVA451.
Application Example As Inverting Power Supply
The TLV62130 can be used as inverting power supply by rearranging external circuitry as shown in Figure 42. As
the former GND node now represents a voltage level below system ground, the voltage difference between VIN
and VOUT has to be limited for operation to the maximum supply voltage of 17V (see Equation 16).
spacing
(16)
spacing
Figure 42. -5V Inverting Power Supply
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