TDA4867J Datasheet, PDF (2/14 Pages) NXP Semiconductors – Full bridge current driven vertical deflection booster

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
V_P
V_FB
I_q(VFB)
supply voltage
flyback supply voltage
quiescent flyback current
Vertical circuit
8.2
−
25
V
note 2
V_P + 6 −
60
V
no load; no signal −
2.5
4
mA
I_{defl(p-p)}
deflection current on pins OUTB
and OUTA (peak-to-peak value)
I_i(dif)
differential input current
Flyback generator
note 3
0.6
−
2.5
A
−
±500 ±600 µA
I_FB(p-p)
maximum current during flyback on
pin V_FB (peak-to-peak value)
Guard circuit; note 1
−
−
2.5
A
V_GUARD
guard voltage
guard on
5.5
6.2
−
V
Notes
1. Voltages refer to pin GND.
2. If V_FB is between 40 and 60 V a decoupling capacitor C_FB = 22 µF (between pin V_FB and pin GND) and a resistor
R_FB = 100 Ω (between pin V_FB and flyback supply voltage) are required (see Fig.6).
3. Differential input current I_i(dif) = I_INP − I_INN.
2003 Feb 05
2