AN2503

PDP Power Devices characteristics

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Typical voltage requirements for a PDP are:

●

Sustain voltage Vs = 200 V

●

Set voltage Vset= 400 V

●

Reset voltage Vreset= -150 V

4.1.2

Energy recovery section

For Energy recovery circuit, the maximum voltage stress is Vs/2

stress depends on the device. The clamping diodes have to withstand a current lower than

10 A, whilst the ERC switches and the ERC diodes have to be able to handle a resonant

half-sinusoidal current up to 100 A peak.

The typical current waveform in the Energy recovery circuit is shown in Figure 23. The key

parameters of the DERC diode for the energy recovery circuit have been optimized in order

to decrease power losses.

Figure 23.

Inductor current

For ER circuit new devices with low voltage drop and very fast turn ON have been

developed.

●

Energy recovery diodes STTH60P03, STTH40P03

Energy recovery diodes (D1, D3, D5, and D7) have been tailored on this application

optimizing key parameters to reduce power losses [6.], [7.]. They have the ability to handle

Table 3.

STTH60P03 Features

Symbol

Parameter

Test conditions

Min.

Typ

Max.

Unit

Reverse

recovery current T

100 V

67.5

A

Softness factor

0.5

Peak forward

voltage

2.5

3.5

V

ER C

current

T1

C lam ping

current

T3

D2

D3