TPS61305YFFT

Voltage - Output:	5.7V
Base Part Number:	TPS61305
Supplier Device Package:	20-DSBGA
Package / Case:	20-UFBGA, DSBGA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Camera Flash
Dimming:	I²C
Frequency:	1.92MHz
Current - Output / Channel:	400mA, 800mA (Flash)
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	2.5V
Number of Outputs:	3
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS61305YFFT – PMIC – LED Drivers The innovative TPS61305YFFT by Texas Instruments has become a go-to power management integrated circuit (PMIC) for many industries due to its unique features and capabilities. This PMIC is specifically designed for providing a variable output current to drive and control LEDs located in automotive, industrial, and consumer applications. This device offers a buck-boost configuration with separate control pins for output current and frequency. In addition, this device also comes equipped with a wide range of voltage inputs, over-voltage protection, a low-quiescent current, and various features to improve system-level thermal protection. Furthermore, TPS61305YFFT implements an Active Phase Cell (APC) parasitic voltage reduction technique which enables configurability in the output current.Applications:Due to its high efficiency and configurable current capability, the TPS61305YFFT is suitable for a wide range of applications. Commonly, this PMIC is used in lighting applications such as ambient lighting, warning and indicator lighting, backlighting, and signal illumination. This PMIC is also very popular in automotive lightings, such as headlights, fog lights, signal indicators, and interior lights. Its capabilities in the consumer markets makes it viable for automotive GPS navigation systems, portable music players, cameras, and other consumer electronics. Additionally, this PMIC is an ideal solution for industrial style applications such as traffic signal lighting and emergency lighting.Mechanism:The TPS61305YFFT incorporates a buck-boost topology with configurable output current controlled by the CEN pin and output frequency via the frequency pin. In this device, a couple of parasitic capacitors exist in parallel with the inductor. These capacitors must be characterized to achieve accurately controlled output current and prevent the PMIC from entering a fault condition due to the high voltage sensed at the SW node. To address this issue, The TPS61305YFFT uses an Active Phase Cell (APC) parasitic voltage reduction technique, enabled by the APC pin. By controlling the APC pin voltage to a certain voltage level, these capacitors can be effectively characterized and used to improve the output current accuracy and the efficiency of the system as a whole.The characteristic output current of the device is also dependent on its operating frequency. If a higher operating frequency is used, the output current can be increased. Conversely, a lower operating frequency will result in lower output current. Furthermore, the frequency of the device can be controlled via a single resistor connected to the up-ratio frequency pin. According to the specified settings, the output current of the TPS61305YFFT can operate over a wide range between 4mA to 20mA. In addition to providing current to the LEDs, the TPS61305YFFT features several built-in protection mechanisms to ensure the security of the underlying devices. These includes over-temperature protection, under-voltage lock out (UVLO), over-voltage protection (OVP), and reverse-current protection. Furthermore, this device also features an analog dimming pin which allows for the adjustment of the brightness through an external resistor.ConclusionThe TPS61305YFFT by Texas Instruments is a versatile power management integrated circuit specifically designed to provide output current and switch frequency flexibility. This PMIC is suitable for automotive, industrial, and consumer applications which require the control of LEDs. Aside from its high efficiency and configurable current capability, this PMIC also comes with several built-in and configurable protection mechanisms to ensure the security of the underlying devices. With the APC pin and analog dimming pin included, the TPS61305YFFT can easily be configured and adjusted to fit the working conditions and requirements of various applications.

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