UCC2977PWRG4

Mfr. #:: UCC2977PWRG4
描述:: LCD Drivers Multi-Topology Piezoelectric
生命週期:: 製造商新產品
數據表:: UCC2977PWRG4 數據表
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更多信息:: UCC2977PWRG4 更多信息 UCC2977PWRG4 Product Details

產品屬性
屬性值

製造商：: 德州儀器

產品分類：: 液晶驅動器

RoHS：: Y

最大時鐘頻率：: 105 kHz

工作電源電壓：: 3 V to 13.5 V

電源電流 - 最大值：: 2.5 mA

最低工作溫度：: - 40 C

最高工作溫度：: + 85 C

安裝方式：: 貼片/貼片

包裝/案例：: TSSOP-8

打包：: 捲軸

高度：: 1.15 mm

長度：: 3 mm

寬度：: 4.4 mm

品牌：: 德州儀器

開發套件：: UCC2977EVM

產品類別：: 液晶驅動器

出廠包裝數量：: 1

子類別：: 驅動IC

單位重量：: 0.005573 oz

Tags: UCC2977P, UCC2977, UCC297, UCC29, UCC2, UCC

Service Guarantees

We guarantee 100% customer satisfaction.

Quality Guarantees

We provide 90-360 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.
Our experienced sales team and tech support team back our services to satisfy all our customers.

we buy and manage excess electronic components, including excess inventory identified for disposal.
Email us if you have excess stock to sell.

Email: [email protected]

Step1:
Vacuum Packaging with PL

Step2:
Anti-Static Bag

Step3:
Packaging Boxes

UCC2977PWRG4 描述

***ser: Converters - CCFL Backlight Multi-Topology Piezoelectric

***ark: Controller IC; Supply Current:1mA; Display Type:CCFL; Supply Voltage Range:3V to 13.5V; Driver Case Style:TSSOP; No. of Pins:8; Operating Temperature Range:-40°C to +85°C; Leaded Process Compatible:Yes; Package/Case:8-TSSOP ;RoHS Compliant: Yes

***as Instruments: Liquid crystal display (LCD) enclosures and cold cathode fluorescent lamps (CCFLs) used in notebook computer and portable electronics displays are becoming increasingly narrow, generating the need for a low profile CCFL power supply. Recent advances in single- and multi-layered piezoelectric ceramic transformers (PZT) have enabled the development of a new generation of efficient, size-reduced backlight converters. The UCC3975/6/7 family of 8-pin PZT controllers integrate the necessary circuitry for operating a PZT-based backlight supply using a flyback, half-bridge, or push-pull topology. The choice of power topology depends on application requirements such as input voltage, lamp voltage, and PZT gain. A half-bridge PZT converter, using the UCC3976 is shown in Figure 1. External P- and N-channel MOSFETs are driven out of phase at a fixed 50% duty cycle with anti-cross conduction circuitry provided by the controller. The half-bridge topology uses only a single magnetic component (LRES) reducing board area. As explained in the applications section of this datasheet, regulation of lamp current is achieved by controlling the operating frequency of the system. The UCC3977 is designed to control a resonant push-pull topology as shown in Figure 2. This controller alternately drives external N-channel MOSFETs at 50% duty cycle. The push-pull topology requires two external inductors (L1 and L2), but has the advantage of providing increased voltage across the piezoelectric transformer primary. In this case a small overlap is provided to the gate drives, assuring an uninterrupted path for inductor current. For piezoelectric transformer applications requiring additional gain, a resonant flyback topology can be implemented using the UCC3975. As shown in Figure 3, a magnetic transformer (T1) provides a stepped up voltage to the piezoelectric transformer primary. When compared to a traditional high-voltage transformer used in a CCFL application, T1 is small and low profile because of its reduced turns ratio and voltage rating. In the resonant flyback application, a single switch is driven at 50% duty cycle producing a half wave rectified sinusoid at the piezoelectric transformer primary.

Market price

型號	描述	庫存	價格
UCC2977PWRG4 DISTI # UCC2977PWRG4-ND	IC TRNSFRMR CNTLR 3-13.5V 8TSSOP RoHS: Compliant Min Qty: 2000 Container: Tape & Reel (TR)	Limited Supply - Call
UCC2977PWRG4 DISTI # 595-UCC2977PWRG4	LCD Drivers Multi-Topology Piezoelectric RoHS: Compliant	0

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