LP8869CQPWPRQ1 - 3-Ch 120mA Auto LED Driver | Texas Instruments
부품 번호: LP8869CQPWPRQ1 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.51 | $3.51 |
| 10 | $3.16 | $31.60 |
| 100 | $2.82 | $282.00 |
| 500 | $2.53 | $1,265.00 |
| 1,000 | $2.25 | $2,250.00 |
| 3,000 | $1.98 | $5,940.00 |
LP8869CQPWPRQ1 개요
A LED driver IC is a power management device that regulates the current flowing through light-emitting diodes, ensuring consistent brightness, extended lifespan, and dimming control. Within the broader taxonomy, this part is a multi-channel constant-current LED driver, a sub-category of power management ICs that interfaces between a vehicle's electrical bus and the LED strings used in instrument panels, head-up displays, and infotainment screens. Automotive LED drivers must meet stringent EMI and temperature requirements defined by AEC-Q100 and OEM-specific standards, and they typically integrate fault protection, PWM dimming, and spread-spectrum modulation to comply with CISPR 25 conducted/radiated emissions.
The LP8869CQPWPRQ1 delivers 120 mA per channel across three high-precision current sinks that can be paralleled for higher current, achieving a typical current matching of 1%. Key features include a high dimming ratio of 10,000:1 at 100 Hz, an input voltage range of 4.5 V to 40 V with load-dump tolerance up to 45 V, an internal switching frequency range of 300 kHz to 2.2 MHz, and integrated protections including under-voltage, over-voltage, and over-temperature. The HTSSOP-20 package with exposed pad keeps junction temperature within the automotive grade 1 range of -40 °C to +125 °C.
Internally, the device uses an asynchronous current-mode control loop for the boost/SEPIC converter, with adaptive output voltage control that minimizes power dissipation by adjusting VOUT to the minimum required for the LED forward voltages. The integrated MOSFETs, current sinks, and PWM dimming logic are designed to reduce EMI through spread-spectrum frequency modulation and careful gate-edge control, enabling CISPR 25 Class 5 compliance in typical automotive display backlight topologies.
Typical applications include automotive LCD display backlighting for instrument clusters, center-stack displays, and head-up displays, as well as interior ambient lighting and small-form-factor automotive lighting where wide input range, low EMI, and high dimming ratio are simultaneously required.
When designing with the LP8869CQPWPRQ1, ensure that the switching frequency is selected away from AM radio bands (typically > 1.7 MHz) and that the input bulk capacitance is sized to handle the worst-case cold-crank and load-dump transients specified by ISO 7637-2.
This page synthesizes real-time distributor pricing, qualified drop-in alternatives, and practical automotive EMI design notes not found in the manufacturer datasheet alone.
드롭인 대체품: LP8869CQPWPRQ1 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LP8867CQPWPRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP8866CQPWPRQ1
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LP8869CQPRWPRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP8869CPWPRQ1
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TPS61196PWPRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP8869CQPWPRQ1 최대 정격 & 전기적 특성
| 토폴로지 | Boost, SEPIC |
| Number of Channels | 3 |
| Output Current per Channel | 120 mA |
| 입력 전압 범위 | 4.5 V to 40 V |
| Load-Dump Tolerance | Up to 45 V |
| 스위칭 주파수 | 300 kHz to 2.2 MHz |
| Dimming Ratio | 10,000:1 at 100 Hz |
| Current Matching | 1% (typical) |
| PWM Dimming | Yes |
| 동작 온도 | -40 °C to +125 °C |
| 패키지 | HTSSOP-20-EP (PWP) |
| 실장 유형 | Surface Mount |
| AEC-Q100 Grade | Grade 1 qualified |
| RoHS 상태 | Compliant |
| Integrated Protections | UVLO, OVP, OTP |
LP8869CQPWPRQ1 핀 구성
| 핀 1 | VIN — Input voltage supply (4.5 V to 40 V) |
| 핀 2 | BST — Boost converter switching node |
| 핀 3 | SW — Switch node connection for external inductor |
| 핀 4 | GND — Ground reference |
| 핀 5 | FB — Boost/SEPIC converter feedback |
| 핀 6 | COMP — Compensation network for control loop |
| 핀 7 | EN — Enable input (active high) |
| 핀 8 | PWM — PWM dimming input |
| 핀 9 | SDA — I2C data (if applicable variant) |
| 핀 10 | SCL — I2C clock (if applicable variant) |
| 핀 11 | ISET — Current set reference |
| 핀 12 | OUT0 — Current sink output channel 0 |
| 핀 13 | OUT1 — Current sink output channel 1 |
| 핀 14 | OUT2 — Current sink output channel 2 |
| 핀 15 | VLED — LED string voltage sense |
| 핀 16 | AGND — Analog ground |
| 핀 17 | PGND — Power ground |
| 핀 18 | NC — Not connected (per datasheet) |
| 핀 19 | NC — Not connected (per datasheet) |
| 핀 20 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
LP8869CQPWPRQ1 적합 용도: 6 애플리케이션s: Automotive Instrument Cluster Backlighting, Center Stack Infotainment Display, Head-Up Display (HUD) Backlighting, Automotive Interior Ambient Lighting, Rear-Seat Entertainment Display, Commercial Vehicle Telematics Display.
Automotive Instrument Cluster Backlighting
The LP8869CQPWPRQ1 drives the LCD backlight of analog/digital instrument clusters in vehicles. Its three 120 mA current sinks match typical 3-string cluster LED architectures, while the 10,000:1 dimming ratio enables smooth brightness transitions from full daylight (1000+ cd/m²) to dark nighttime driving. The AEC-Q100 Grade 1 qualification and 4.5-40 V input range with 45 V load-dump tolerance ensure survival across cold-crank, start-stop, and load-dump events without external protection. Placed between the vehicle battery rail and the LED strings with a boost inductor on the switching node, it replaces discrete driver designs and reduces BOM by integrating MOSFETs, current sinks, and protection. Performance benefit: 1% current matching ensures uniform cluster brightness across all indicators and gauges.
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Center Stack Infotainment Display
The LP8869CQPWPRQ1 powers the backlight of automotive center-stack infotainment touchscreens. Its boost/SEPIC topology adapts to different LED string configurations used by display manufacturers, while the 300 kHz to 2.2 MHz programmable switching frequency allows the designer to place the switching node above the AM radio band (>1.7 MHz) for CISPR 25 Class 5 EMI compliance. The integrated spread-spectrum modulation further reduces EMI peaks, simplifying EMC certification. Placed near the display FPC connector with proper input bulk capacitance for load-dump transients, it delivers clean, dimmable power for high-resolution TFT panels.
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Head-Up Display (HUD) Backlighting
The LP8869CQPWPRQ1 is well suited for head-up display backlighting where extremely uniform brightness and high dimming precision are critical. The 1% typical current matching between channels prevents visible brightness banding across the projected image, while the 10,000:1 dimming ratio enables flicker-free transitions as ambient light changes from tunnel entry to direct sun. The AEC-Q100 Grade 1 qualification meets the thermal and reliability demands of windshield-mounted HUD modules that operate in direct solar load. Placed close to the HUD LED light engine with a SEPIC converter for grounded-anode LED strings, it provides stable illumination.
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Automotive Interior Ambient Lighting
The LP8869CQPWPRQ1 drives RGB or white LED strings used for interior ambient lighting in door panels, footwells, and dashboard accents. Its three independent current sinks enable direct RGB color mixing without external multiplexer ICs, while PWM dimming at 100 Hz to 1 kHz allows smooth color and intensity transitions. The wide 4.5-40 V input range accommodates 12V and 24V vehicle systems, and the HTSSOP-20-EP package's exposed pad provides sufficient thermal dissipation for continuous ambient lighting operation. Performance benefit: integrated fault protection (UVLO, OVP, OTP) prevents catastrophic failure from wiring shorts.
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Rear-Seat Entertainment Display
The LP8869CQPWPRQ1 powers the backlight of rear-seat entertainment (RSE) displays mounted in headrests or roof consoles. The boost topology efficiently drives higher-VF LED strings required for large-screen LCDs, while the high switching frequency enables small inductor selection, saving PCB space in compact RSE modules. The automotive qualification ensures reliable operation across the cabin temperature range, and the integrated current sinks simplify multi-display synchronization by accepting a shared PWM dimming signal. Placed adjacent to the RSE display driver board, it provides clean, dimmable power.
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Commercial Vehicle Telematics Display
The LP8869CQPWPRQ1 is suitable for telematics and fleet management displays in commercial 24V vehicles. The 4.5-40 V input range with 45 V load-dump tolerance exceeds ISO 7637-2 24V system pulse requirements, eliminating the need for external TVS protection. The boost/SEPIC flexibility supports both common-anode and grounded-anode LED configurations used by different panel vendors. The AEC-Q100 Grade 1 qualification and 125 °C maximum junction temperature withstand under-hood and dashboard-mount thermal stress. Placed near the telematics module's display connector, it ensures reliable operation in harsh electrical environments.
추천
추천 제품 요약
엔지니어링 참조 데이터: LP8869CQPWPRQ1 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LP8867CQPWPRQ1 | LP8866CQPWPRQ1 | TPS61196PWPRQ1 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | HTSSOP-20-EP (PWP) | HTSSOP-20-EP (PWP) - same | HTSSOP-20-EP (PWP) - same | HTSSOP-20-EP (PWP) - same |
| Number of Channels | 3 | 4 | 3 (lower current) | 6 |
| Input Voltage Range | 4.5 V to 40 V | 4.5 V to 40 V | 4.5 V to 40 V | 8 V to 30 V |
| Topology | Boost, SEPIC | Boost, SEPIC | Boost, SEPIC | Boost only |
| Dimming Ratio | 10,000:1 at 100 Hz | 10,000:1 at 100 Hz | 10,000:1 at 100 Hz | 5,000:1 at 200 Hz |
| AEC-Q100 Grade | Grade 1 | Grade 1 | Grade 1 | Grade 1 |
주요 차별점
- Highest dimming ratio in 3-channel automotive LED driver family (vs TPS61196PWPRQ1)
- Wide input voltage range with 45 V load-dump tolerance (vs TPS61196PWPRQ1)
- Dual boost/SEPIC topology support (vs TPS61196PWPRQ1)
설계 노트
Program the switching frequency above 1.7 MHz to avoid interference with the AM radio band (530-1710 kHz). The LP8869CQPWPRQ1 supports 300 kHz to 2.2 MHz, and selecting 2.0 MHz or 2.1 MHz places the fundamental and harmonics well above AM. The internal spread-spectrum modulation further reduces peak EMI by dithering the switching frequency, helping achieve CISPR 25 Class 5 compliance without extensive shielding.
Size the input bulk capacitor to handle worst-case cold-crank and load-dump transients per ISO 7637-2. A 47 µF aluminum polymer or 22 µF X7R ceramic rated for 50 V or higher is typically sufficient. Place the bulk capacitor as close as possible to the VIN pin to minimize parasitic inductance, and add a 100 nF ceramic decoupling capacitor directly at the IC for high-frequency noise suppression.
The HTSSOP-20-EP package uses an exposed thermal pad that must be soldered to a copper pour of at least 1 square inch for adequate heat dissipation. Estimated: at VIN=12V, VOUT=20V (boost mode), and 360 mA total LED current (3 channels × 120 mA), the IC dissipates approximately 1.4 W. With proper PCB copper area, junction temperature remains well within the 125 °C automotive grade 1 limit.
규정 준수 정보
AEC-Q100 Grade 1 qualified for automotive applications. Device temperature grade 1: -40°C to +125°C. RoHS and REACH compliant per TI product page.
