TDA4867 데이터 시트보기 (PDF) - Philips Electronics

부품명

상세내역

제조사

TDA4867

Full bridge current driven vertical deflection booster

Philips Electronics 

Philips Semiconductors

Full bridge current driven vertical

deflection booster

Preliminary specification

TDA4867J

FEATURES

• Fully integrated, few external components

• Maximum 2.5 A (p-p) deflection current

• No additional components in combination with the

deflection controller family TDA485x and SAA4856

• Pre-amplifier with differential high CMRR current mode

inputs

• Low offsets

• High linear sawtooth signal amplification

• High efficient DC-coupled vertical output bridge circuit

• High deflection frequency up to 200 Hz

• Power supply and flyback supply voltage independent

adjustable to optimize power consumption and flyback

time

• Excellent transition behaviour during flyback

• Guard circuit for screen protection

• Power save mode controlled by input pins

(in combination with SAA4856 only) or guard pin.

GENERAL DESCRIPTION

The TDA4867J is a power booster for use in colour vertical

deflection systems for frame frequencies of 50 to 200 Hz.

The circuit provides a high CMRR current driven

differential input. Due to the bridge configuration of the two

output stages DC-coupling of the deflection coil is

achieved. In conjunction with the deflection controller

family TDA485x and SAA4856 the ICs offer an extremely

advanced system solution.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

DC supplies; note 1

VP

VFB

Iq(VFB)

supply voltage

flyback supply voltage

quiescent flyback current

Vertical circuit

8.2

−

25

V

note 2

VP + 6 −

60

V

no load; no signal −

2.5

4

mA

Idefl(p-p)

deflection current on pins OUTB

and OUTA (peak-to-peak value)

Ii(dif)

differential input current

Flyback generator

note 3

0.6

−

2.5

A

−

±500 ±600 µA

IFB(p-p)

maximum current during flyback on

pin VFB (peak-to-peak value)

Guard circuit; note 1

−

−

2.5

A

VGUARD

guard voltage

guard on

5.5

6.2

−

V

Notes

1. Voltages refer to pin GND.

2. If VFB is between 40 and 60 V a decoupling capacitor CFB = 22 µF (between pin VFB and pin GND) and a resistor

RFB = 100 Ω (between pin VFB and flyback supply voltage) are required (see Fig.6).

3. Differential input current Ii(dif) = IINP − IINN.

2003 Feb 05

2

Share Link: