A8501KLPTR-T

Voltage - Output:	--
Base Part Number:	A8501
Supplier Device Package:	28-TSSOP-EP
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Applications:	Backlight
Dimming:	PWM
Frequency:	2MHz
Current - Output / Channel:	100mA
Series:	--
Voltage - Supply (Max):	21V
Voltage - Supply (Min):	8V
Number of Outputs:	4
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Active
Packaging:	Tape & Reel (TR)

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A8501KLPTR-T Application Field and Working PrinciplePMIC (Power Management Integrated Circuit) - LED Drivers are used for controlling the current used in the LED which is in turn used for driving the LED luminance. This technique is used to control the current in the LED, which in turn controls the brightness of the LED. The A8501KLPTR-T LED Driver from Toshiba is one such device used for controlling the LED current.Application FieldThe A8501KLPTR-T LED Driver from Toshiba is used in applications where the LED current needs to be controlled. It is used in applications such as indicator lamps, backlighting circuits, wireless communication modules, and automotive onboard indicators. This device is also used in LCD monitors, TVs, photocopiers, and scanning machines.Working PrincipleThe A8501KLPTR-T LED Driver is a 3-channel Constant-Current/Voltage Regulator IC. It consists of a resistor string which generates the constant voltage corresponding to the input voltage. The IC also has a pre-set frequency pulse width modulation circuit for generating the constant current. This constant current is then used for driving the LED. The PWM frequency can be programmed externally. The IC has an adjustable output current from 5 mA to 200 mA per channel. The current accuracy of the IC is ±1%.The A8501KLPTR-T also has a built-in fault sensing circuit for monitoring the output current. This ensures that the output current does not exceed the maximum current and does not fall below the minimum current. This protects the LEDs from being over-driven or under-driven, thus reducing their lifespan.The IC also features miller capacitance compensation, over current protection, short circuit protection, and thermal shutdown protection. It is designed to operate in the temperature range of -40°C to +85°C. The device is packaged in an 8-pin TSSOP package and is compatible with standard SMD assembly lines.The A8501KLPTR-T LED Driver from Toshiba is ideal for driving LED solutions with precision and accuracy. Its flexible design and wide range of features make it suitable for a variety of LED applications.

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