TB2926HQ Toshiba, TB2926HQ Datasheet - Page 7
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TB2926HQ
Manufacturer Part Number
TB2926HQ
Description
Manufacturer
Toshiba
Datasheet
1.TB2926HQ.pdf
(18 pages)
Specifications of TB2926HQ
No. Of Channels
4
Package
HZIP 25-P-1.00F
Recommended Vcc (v)
13.2
Rl=2 Ohm
Not Supported
Rl=4 Ohm
43W x 4
Rl=8 Ohm
-
Features/built-in Functions
4 BTL channels, standby switch, mute, low-RON BiCD process, DC offset detection
Operating Voltage (v)
9 to 18
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TB2926HQ
Manufacturer:
TOSHIBA/东芝
Quantity:
20 000
5. Prevention of speaker damage
Note 4: An abnormal DC offset voltage is incurred when the input bias to the power IC is lost due to a leakage
< Speaker damaging scenario >
When the DC resistance between the OUT+ and OUT− pins falls below 1 Ω, the output current exceeds 4 A.
At this time, the protection circuit is activated to limit the current draw into the speaker.
This feature prevents the speaker from being damaged, as follows:
A DC current of over 4 V is applied to the speaker due to an external circuit failure (Note 4).
(Abnormal DC output offset)
The speaker impedance becomes 1 Ω or less due to a layer short.
A current of over 4 A flows into the speaker, damaging the speaker.
current from a coupling capacitor at the input or a short-circuit between the IN and adjacent lines.
Less than 4 A
↓
↓
Current into the speaker
(in case of a layer short-circuit of the speaker)
About 1 Ω
Figure 8
7
The short-circuit protection is activated
4 Ω
Speaker Impedance
TB2926HQ
2006-11-27