LP8867QPWPRQ1 LED Lighting Drivers: Pinout and Datasheet

LP8867QPWPRQ1 is an automotive highly integrated, low-EMI, easy-to-use LED driver with a DCDC converter. The DC-DC  converter supports both boost and SEPIC mode operation. The device has

four or three high-precision current sinks that can be combined for higher current capability.

The DC-DC converter has adaptive output voltage control based on the LED forward voltages. This

feature minimizes the power consumption by adjusting the voltage to the lowest sufficient level in all conditions. For EMI reduction DC-DC  supports spread spectrum for switching frequency and an external synchronization with a dedicated pin. A wide-range adjustable frequency allows the LP8867QPWPRQ1  to avoid disturbance for the sensitive frequency band.

The input voltage range for the LP8867QPWPRQ1  is from 4.5 V to 40 V to support automotive start-stop and load dump conditions. LP8867QPWPRQ1  integrates extensive fault detection features.

Symbol

Footprint

3D Models

  1. Automotive

Advanced driver assistance systems (ADAS)/Body electronics & lighting/Hybrid, electric & powertrain systems/Infotainment & cluster

  2.Communications equipment

Broadband fixed-line access/Datacom module/Wired networking/Wireless infrastructure

  3.Personal electronics

Connected peripherals & printers/Data storage/Gaming/Home theater & entertainment/Mobile phones/PC & notebooks/Portable electronics/Tablets/TV/Wearables (non-medical)

 LP8867QPWPRQ1 has 5 states totally.

①　STANDBY State

The LP886x-Q1 enters STANDBY state when the VIN voltage powers on and voltage is higher than VINUVLO rising threshold, which is 4-V typical. In the STANDBY state, the device is able to detect VDDIO/EN signals. When VDDIO/EN is pulled high, the internal LDO wakes up and the device enters into a SOFT START state. The device will re-enter the STANDBY state when VDDIO/EN is pulled low for more than 50 µs.

②　SOFT START State

In the SOFT START state, Power-line FET is enabled, and boost input and output capacitors are charged to VIN level. VIN_OCP, VIN_OVP, VIN_UVLO, SW_OVP, and TSD fault are active. After 65 ms, the device enters into the BOOST START state.

③　BOOST START State

In the BOOST START state, the DC-DC controller is turned on, and boost voltage is ramped to the initial boost voltage level with a reduced current limit. VIN_OCP, VIN_OVP, VIN_UVLO, SW_OVP, and TSD fault are active in this state. After 50 ms, LED outputs to do a one-time detection on grounded outputs. Grounded outputs are disabled and excluded from the adaptive voltage control loop. Then the device enters into a NORMAL state.

④　NORMAL State

In the NORMAL state, LED drivers are enabled when the PWM signal is high. All faults are active in this state. Fault pin will be released high in the start of NORMAL state if recovering from FAULT RECOVERY state and no fault is available.

⑤　FAULT RECOVERY State

Non-LED faults can trigger a fault recovery state. LED drivers, boost converter, and power-line FET are all disabled. After 100 ms, the device attempts to restart from the SOFT START state if VDDIO/EN is still high.

• AEC-Q100 Qualified for automotive applications:

– Device temperature grade 1:–40°C to +125°C, TA

• Functional safety capable

– Documentation available to aid functional safety system design

• 3-, 4-Channel 120-mA current sinks

– High dimming ratio of 10 000:1 at 100 Hz

– Current matching 1% (typical)

– LED String current up to 120 mA per channel

– Outputs can be combined externally for higher current per string

• Integrated boost and SEPIC converter for LED string power

– Input voltage operating range 4.5 V to 40 V

– Output voltage up to 45 V

– Integrated 3.3-A Switch FET

– Switching frequency 300 kHz to 2.2 MHz

– Switching synchronization input

– Spread spectrum for lower EMI

• Fault detection and protection

– Fault output

– Input voltage OVP, UVLO, and OCP

– Boost block SW OVP and output OVP

– LED open and short fault detection

– Power-Line FET control for battery bus protection

– Automatic LED current reduction with external temperature sensor

– Thermal shutdown

Texas Instruments Incorporated (TI) is an American technology company based in Dallas, Texas, that designs and manufactures semiconductors and integrated circuits for electronic designers and manufacturers around the world. Based on sales volume, it is one of the top ten semiconductor companies in the world. Analog chips and embedded processors, which account for more than 80% of the company's revenue, are the company's main focus. TI also makes calculators, microcontrollers, and multi-core processors, as well as TI digital light processing technology and education technology. As of 2016, the company had 45,000 patents worldwide.

NA LP8867QPWPRQ1 technical specifications, attributes, parameters and parts with similar specifications to NA LP8867QPWPRQ1.