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TPS60231RGTR Datasheet(PDF) 4 Page - Texas Instruments

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No. de Pieza. TPS60231RGTR
Descripción  WHITE LED CHARGE PUMP CURRENT SOURCE WITH PWM BRIGHTNESS CONTROL
Descarga  16 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS60231RGTR Datasheet(HTML) 4 Page - Texas Instruments

 
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PIN ASSIGNMENT
PGND
VIN
EN1
D2
D1
VOUT
GND
3
1
2
7
5
6
8
12
11
10
9
15
13
14
16
EN2
4
QFN PACKAGE
(TOP VIEW)
TPS60231
SLVS544 – OCTOBER 2004
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
C1+
10
Connect to the flying capacitor C1
C1–
11
Connect to the flying capacitor C1
C2+
9
Connect to the flying capacitor C2
C2–
12
Connect to the flying capacitor C2
D1-D3
6-4
I
Current sink input. Connect the cathode of the white LEDs to these inputs.
Enable input. A logic high enables the converter, logic low forces the device into shutdown mode reducing
EN1
15
I
the supply current to less than 1 µA if EN2 is tied to GND.
An applied PWM signal reduces the LED current as a function of the duty cycle of the PWM signal. EN1 and
EN2 can be tied together for PWM dimming between 0 mA and the maximum set with ISET. EN1 and EN2
EN2
16
I
can also be used for digital dimming with 4 steps from 0 mA to the maximum current set with ISET. See the
application section for more details.
GND
14
Analog ground
ISET
1
I
Connect a resistor between this pin and GND to set the maximum current through the LEDs.
NC
2, 3
No internal connection
PGND
7
Power ground
VIN
13
I
Supply voltage input
VOUT
8
0
Connect the output capacitor and the anode of the LEDs to this pin.
Power PAD
Connect with PGND and GND
4


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