TB2906HQ Toshiba, TB2906HQ Datasheet - Page 6
TB2906HQ
Manufacturer Part Number
TB2906HQ
Description
Manufacturer
Toshiba
Datasheet
1.TB2906HQ.pdf
(16 pages)
Specifications of TB2906HQ
No. Of Channels
4
Package
HZIP 25-P-1.00F
Recommended Vcc (v)
13.2
Rl=2 Ohm
Not Supported
Rl=4 Ohm
45W x 4
Rl=8 Ohm
-
Features/built-in Functions
4 BTL channels, standby switch, mute, BiCD process, offset detection, 34dB gain
Operating Voltage (v)
9 to 18
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TB2906HQ
Manufacturer:
TOSHIBA
Quantity:
611
Part Number:
TB2906HQ
Manufacturer:
TOSHIBA/东芝
Quantity:
20 000
5. Prevention of speaker burning accident
Note 1: It is appeared by biased input DC voltage
current over 4 A flows, this IC makes a protection circuit operate and suppresses the current into a speaker.
This system makes the burning accident of the speaker prevent as below mechanism.
When the direct current resistance between OUT+ and OUT− terminal becomes 1 Ω or less and output
(For example, large leakage of the input capacitor, short-circuit between copper patterns of PCB.)
<The guess mechanism of a burning accident of the speaker>
Abnormal output offset voltage (voltage between OUT+ and OUT−) over 4 V is made by the external
circuit failure.(Note 1)
The speaker imepedance becomes 1 Ω or less as it is in a rare short circuit condition.
The current more than 4 A flows into the speaker and the speaker is burned.
Less than 4A
↓
↓
Current into a speaker
Figure 8
About 1 Ω
6
(in case of rare short circuit of speaker)
Operating point of protector
4 Ω
Speaker Impedance
TB2906HQ
2004-03-23