TFA9810 NXP Semiconductors, TFA9810 Datasheet - Page 7

• Manufacturer Part Number: TFA9810
• Description: The TFA9810 is a two-channel power comparator for high-efficiency class D audioamplifier systems
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 6.
TFA9810_3
Product data sheet
Protections
Symbol
OTP
OCP
OVP
UVP
ODP
WP
Overview protections
Condition
T
I
V
V
T
OUTX > V
OUTX < V
O
j
j
P
P
> 150 C
> 135 C and I
> I
> 20 V
< 8 V
ORM
DDA
SSA
•
•
•
•
+ 1 V
- 1 V or
OverVoltage Protection (OVP)
When the supply voltage applied to the TFA9810 exceeds the maximum supply
voltage threshold level the device will shut down. The device will restart when the
supply voltage is within the operating range.
UnderVoltage Protection (UVP)
When the supply voltage applied to the TFA9810 falls below the minimum supply
voltage threshold level the device will shut down. The device will restart when the
supply voltage is within the operating range.
OverDissipation Protection (ODP)
The ODP in the TFA9810 is a combination of two protections. Exceeding a
temperature threshold level of 135 C an internal pre-warning is generated. When an
overcurrent is detected during the pre-warning the device will shut down. When the
ENABLE pin is high the TFA9810 will restart automatically. The restart sequence
(switch-off
Window Protection (WP)
During start-up, if one of the outputs is shorted to V
This is an effective measure to protect the device against shorts between the outputs
(before the filter) and the ground or supply lines. The supply must be switched off prior
to removing any short. The WP protects the device against failure during board
assembly.
O
> I
ORM
DIAG
LOW
LOW
LOW
LOW
LOW
LOW
switch-on) will take 200 ms to 500 ms.
Rev. 03 — 20 February 2008
Outputs
Floating
Floating
Floating
Floating
Floating
Recovering
Automatic, after 5 s and T
Automatic, after 5 s and I
Restart (switch-off
Restart (switch-off
Restart (switch-off
T
j
< 135 C or I
O
< I
SS
ORM
or V
switch-on when V
switch-on when V
switch-on when
)
DD
O
j
Audio amplifier 2 x 12 W
< 150 C
< I
the device will not start.
ORM
© NXP B.V. 2008. All rights reserved.
TFA9810
P
P
< 20 V)
> 8 V)
7 of 29