tda2500 Tripath Technology Inc., tda2500 Datasheet - Page 20

• Manufacturer Part Number: tda2500
• Description: Stereo Class-t Digital Audio Amplifier Driver Using Digital Power Processing Dpp
• Manufacturer: Tripath Technology Inc.

The procedure for shifting the VPP range is as follows:
1) Choose the minimum VPP over-voltage reset point, VPP
2) Use the following equation to calculate the external parallel resistor, R
3) Use the following equation to calculate the resulting maximum VPP under-voltage restart point,
VPP
VPP
The usable (inside the hysteresis band) positive supply range is defined by VPP
VPP
A similar procedure for shifting the VNN range is as follows.
1) Choose the minimum VNN over-voltage reset point, VNN
2) Use the following equation to calculate the external parallel resistor, R
3) Use the following equation to calculate the resulting maximum VNN under-voltage restart point,
VNN
VNN
20
R
R
Set R
Set R
VPP1
VPP1
UVRSTMAX
UVRSTMAX
UVRSTMAX
UVRSTMAX
UVRSTMAX
VPP2
VNN2
1.4M
1.27M
193.2V
193.04V
= R
= 3 * R
.
= 87uA * (R
= 95uA * (R
VPP1
:
:
VNN1
*
-
*
VPP
R
-
VPP
R
VNN
VNN2
VNN
VPP2
VPP1
VNN1
OVRSTMIN
OVRSTMIN
V5
V5
OVRSTMIN
OVRSTMIN
|| 1.4M:)
Figure 4: Over / Under voltage sense circuit
|| 1.27M:)
VNN
VPP
R
R
VNN1
VPP1
37
38
VHIGH
VLOW
TDA2500
T r i p a t h T e c h n o l o g y , I n c . - T e c h n i c a l I n f o r m a t i o n
OVRSTMIN
OVRSTMIN
VPP1
VNN1
TDA2500 – KL/ Rev. 0.9/05.05
OVRSTMIN
minus