TPS61301 datasheet(13/77 Pages) TI

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TPS61300

TPS61301

TPS61305, TPS61305A

www.ti.com

SLVS957D – JUNE 2009 – REVISED OCTOBER 2012

PIN FUNCTIONS (TPS61306)

I/O

DESCRIPTION

NAME

NO.

AVIN

This is the input voltage pin of the device. Connect directly to the input bypass capacitor.

VOUT

This is the output voltage pin of the converter.

LED1

LED return input. This feedback pin regulates the LED current through the internal sense resistor by

regulating the voltage across it. The regulation operates with typically 400mV (HC_SEL = L) or 400mV

LED2

(HC_SEL = H) dropout voltage. Connect to the cathode of the LEDs.

LED3

FLASH_SYNC

Flashlight strobe pulse synchronization input.

FLASH_SYNC = LOW: The device is operating and regulating the LED current to the DC light current level

(DCLC).

FLASH_SYNC = HIGH: The device is operating and regulating the LED current to the flashlight current

level (FC).

HC_SEL

Extended high-current mode selection input. This pin must not be left floating and must be terminated.

HC_SEL = LOW: LED direct drive mode. The power stage is active and the maximum LED currents are

defined as 445mA/890mA/445mA (ILED1/ILED2/ILED3).

HC_SEL = HIGH: Energy storage mode. In flash mode, the power stage is either active with reduced

current capability or disabled. The maximum LED current is defined as 1025mA/2050mA/1025mA

(ILED1/ILED2/ILED3).

SCL

Serial interface clock line. This pin must not be left floating and must be terminated.

SDA

I/O

Serial interface address/data line. This pin must not be left floating and must be terminated.

GPIO/PG

I/O

This pin can either be configured as a general purpose input/output pin (GPIO) or either as an open-drain

or a push-pull output to signal when the converters output voltage is within the regulation limits (PG). Per

default, the pin is configured as an open-drain power-good output.

I/O

NTC resistor connection. This pin can be used to monitor the LED temperature. Connect a 220k

Ω NTC

resistor from the TS input to ground. In case this functionality is not desired, the TS input should be tied to

AVIN or left floating.

INDLED

This pin provides a constant current source to drive low VF LEDs. Connect to LED anode.

ENDCL

Hardware control pin for DC light operation. Pulling this pin high forces the device into DC light operation.

The ENDCL input is only active when the device is programmed into shutdown or voltage mode regulation.

LED1-3 inputs are controlled according to ENLED[3:1] bit settings.

Tx-MASK

RF PA synchronization control input. Pulling this pin high turns the LED from flashlight to DC light

operation, thereby reducing almost instantaneously the peak current loading from the battery.

I/O

Inductor connection. Drain of the internal power MOSFET. Connect to the switched side of the inductor.

SW is high impedance during shutdown.

BAL

Balancing output for dual cells super-capacitor. In steady-state operation, this output compensates for

leakage current mismatch between the cells.

PGND

Power ground. Connect to AGND underneath IC.

AGND

Analog ground.

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Product Folder Links: TPS61300 TPS61301 TPS61305 TPS61305A

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