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TI LP8556SQX-E08/NOPB product image
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TI LP8556SQX-E08/NOPB

Manufacturer
TI
MPN
LP8556SQX-E08/NOPB
LCSC Part #
C701971
Packaging
WQFN-24-EP(4x4)
Customer #
Key Attributes
23mA 312kHz~1.25MHz 4 DC-DC 16V~34.5V 2.7V~36V WQFN-24-EP(4x4) LED Drivers RoHS
DatasheetTI LP8556SQX-E08/NOPB
RoHS Compliance1 documents available
In-Stock: 98
98 In stock, ships now
Minimum: 1Multiple: 1Sales Unit: Piece
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QtyUnit PriceTotal Amount
1+$ 1.7646$ 1.76
10+$ 1.5768$ 15.77
30+$ 1.4446$ 43.34
100+$ 1.3255$ 132.55
500+$ 1.2683$ 634.15
1,000+$ 1.2471$ 1247.10
Standard Packaging4500/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/LED Drivers
ManufacturerTI
PackagingWQFN-24-EP(4x4)
Operating Temperature-30℃~+85℃
Output Current23mA
Frequency - Switching312kHz~1.25MHz
DimmingPWM;I2C
Number of Channels4
TypeDC-DC
Switch tube (built-in/external)Built-in
FeaturesOver Voltage Protection;Built-in soft-start;Short Circuit Protection;LED open-circuit protection;Over-Temperature Protection (OTP)
Output Voltage16V~34.5V
TopologyBoost
Voltage - Input(DC)2.7V~36V
Constant Current Accuracy1%
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Introduction

AI Translation

The LP8556 device is a white LED driver with an asynchronous boost converter and six high-precision current sinks that can be controlled by a PWM signal or an I²C master device. The boost converter uses adaptive output voltage control to set the optimal voltage for the LED driver between 7V and 43V. This feature can adjust the output voltage to the lowest level that meets all conditions, thereby minimizing power consumption. The converter can operate at three switching frequencies: 312kHz, 625kHz, and 1250kHz. The switching frequency can be set using an external resistor or pre-configured via EPROM. Programmable slew rate control and spread spectrum schemes minimize switching noise and improve EMI performance. The PWM dimming resolution is up to 15 bits, which can be used to set the LED sinking current. The proprietary adaptive dimming mode can save system energy to a greater extent. In addition, the phase-shifted LED PWM dimming function reduces audible noise and allows the use of a smaller boost output capacitor. The LP8556 device also has complete fault protection features to ensure the reliable operation of the device and external components. These include input under-voltage lockout (UVLO), thermal shutdown (TSD), over-current protection (OCP), up to 6-level over-voltage protection (OVP), LED open and short-circuit detection. The operating ambient temperature range of the LP8556 is from -30°C to +85°C. It is available in a space-saving 20-pin DSBGA package and a 24 thermal pad WQFN package.

Features

AI Translation
  • High-efficiency DC/DC boost converter with integrated 0.19Ω power MOSFET
  • Three switching frequency options: 312kHz, 625kHz, and 1250kHz
  • 2.7V to 36V boost switch input voltage range, supporting multi-cell Li-ion batteries (2.7V to 20V VDD input range)
  • 7V to 43V boost switch output voltage range
  • Supports 3 to 12 series WLEDs per channel
  • Configurable channel count (1 to 6)
  • Up to 50mA per channel
  • PWM and/or I²C dimming control
  • Phase-shifted PWM mode reduces audible noise
  • Adaptive dimming for higher LED driver optical efficiency
  • Programmable edge rate control and spread spectrum scheme to minimize switching noise and improve EMI performance
  • LED fault (short and open circuit) detection, UVLO, TSD, OCP, and OVP (up to 6 threshold options)
  • Available in compact 20-pin, 0.4mm pitch DSBGA and 24-pin, 0.5mm pitch WQFN packages

Applications

AI Translation
  • LED backlight for tablet LCD