TB2905HQ Toshiba, TB2905HQ Datasheet

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TB2905HQ

Manufacturer Part Number
TB2905HQ
Description
Manufacturer
Toshiba
Datasheet

Specifications of TB2905HQ

No. Of Channels
4
Package
HZIP 25-P-1.00F
Recommended Vcc (v)
13.2
Rl=2 Ohm
80W x 4
Rl=4 Ohm
50W x 4
Rl=8 Ohm
-
Features/built-in Functions
4 BTL channels, standby switch, mute, BiCD process, Class-KB high efficiency
Operating Voltage (v)
9 to 18

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Part Number:
TB2905HQ
Manufacturer:
ST
0
Class KB High-Efficiency, Low-Frequency Power Amplifier IC
Maximum Power: 47 W × 4 Channels
IC developed for car audio applications that incorporates four
BTL amplifier channels.
consisting of P-ch upper and N-ch lower sections, offering a
maximum output power (P
heat generation of comparable class AB solutions under normal
operating conditions. Therefore, it is possible to design a smaller
heatsink and maintain lower internal temperature in the car
audio sets.
protective circuits, and self diagnosis.
Features
The TB2905HQ is a high-efficiency class KB power amplifier
It employs a pure complementary DMOS output stage
Class KB (keyed BTL) amplifiers exhibit less than half the
Additionally, the TB2905HQ has many built-in functions for car audio, such as standby switching, muting,
High output power
: P
: P
: P
: P
: P
: P
Low distortion ratio
: THD = 0.03% (typ.)
Low noise
: V
Built-in standby (pin 4) and muting (pin22) functions
Built-in offset/clipping detection (pin 25)
Protective circuits: Thermal shutdown, overvoltage, out to GND, out to V
Operating supply voltage: V
Note 1: Some pins of this product are sensitive to electrostatic discharge. When handling this product, ensure that
Note 2: Install the product correctly. Otherwise, the product or connected equipment may get damaged or degrade.
Note 3: These protective features are intended to temporarily prevent an output short circuit or other abnormal
(V
(V
(V
(V
(V
(V
(V
(V
OUT
OUT
OUT
OUT
OUT
OUT
NO
CC
CC
CC
CC
CC
CC
CC
CC
= 120 µVrms (typ.)
= 14.4 V, f = 1 kHz, JEITA max, R
= 13.7 V, f = 1 kHz, JEITA max, R
= 14.4V, f = 1 kHz, JEITA max, R
= 14.4 V, f = 1 kHz, THD = 10%, R
= 13.2 V, f = 1 kHz, THD = 10%, R
= 14.4 V, f = 1 kHz, THD = 10%,R
= 13.2 V, f = 1 kHz, G
= 13.2 V, G
MAX (1) = 47 W (typ.)
MAX (2) = 43 W (typ.)
Pout MAX (3) = 80 W (typ.)
(1) = 29 W (typ.)
(2) = 25 W (typ.)
(3) = 55 W (typ.)
the environment is protected against electrostatic discharge.
conditions from occurring. Toshiba does not guarantee that they prevent the IC from being damaged.
If the product is operating outside any of the guaranteed operating ranges, these protective features may
not operate and an output short circuit may result in the IC being damaged.
TOSHIBA Bi-CMOS Digital Integrated Circuit Silicon Monolithic
V
= 26dB, Rg = 0 Ω, BW = 20 Hz~20 kHz, R
OUT
) of 47 W.
CC
V
= 26dB, P
(opr) = 9 to 18 V (R
TB2905HQ
OUT
L
L
L
L
L
L
= 2 Ω)
= 2 Ω)
= 4 Ω)
= 4 Ω)
= 4 Ω)
= 4 Ω)
= 2 W, R
L
= 4 Ω)
L
1
= 4 Ω)
L
= 4 Ω)
Weight: 7.7 g (typ.)
CC
, out to out short
TB2905HQ
2005-08-17

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TB2905HQ Summary of contents

Page 1

... AB solutions under normal operating conditions. Therefore possible to design a smaller heatsink and maintain lower internal temperature in the car audio sets. Additionally, the TB2905HQ has many built-in functions for car audio, such as standby switching, muting, protective circuits, and self diagnosis. Features • ...

Page 2

... CC2 CC1 OUT1 (+) IN1 PW-GND1 OUT1 (−) OUT2 (+) IN2 PW-GND2 OUT2 (−) STBY OUT3 (+) IN3 PW-GND3 OUT3 (−) OUT4 (+) IN4 PW-GND4 OUT4 (−) MUTE Offset/Clip Det 2 TB2905HQ + ohm ohm ohm ohm ...

Page 3

... Operational Description (Each description applies to a single channel) 1. Voltage Gain The TB2905HQ has no NF (negative feedback) pins. Therefore, the voltage gain (G within the IC. Voltage gain of amplifier 1: G Voltage gain of amplifiers 2A and 2B: G Voltage gain obtained by BTL connection: G Therefore, the total voltage gain is determined by the following expression: ...

Page 4

... Example: When changing the control voltage from 3 V/3 kΩ kΩ The TB2905HQ internally triggers muting when the voltage is dropped, taking in a current of 200 µA. It cannot take in the current if the pull-up resistance is too low. The series resistance (R1) for pin 22 must, therefore least 47 kΩ ...

Page 5

... Voltage at point B (LPF output) GND − V bias TB2905HQ Output DC voltage (+) (for RS1) V (normal DC voltage) CC/2 Output DC voltage (−) (for RS2) Output offset voltage (upon input capacitor leakage or short-circuit) L.P.F. To microcontroller The smoothing microcontroller shuts down the circuit B system if the output is lower than the specified voltage ...

Page 6

... Output AC waveform (B) Clipping detection circuit (C) Clipping detection pin (output of pin 25) GND Figure 8 Clipping detection mechanism (Pin 25 L.P.F. smoothing circuit Pin 25: Open-collector output (active low) AC (A) Clipped level DC ( TB2905HQ Volume control circuit Tone control circuit t Clipped level t t 2005-08-17 ...

Page 7

... Pop Noise Suppression The TB2905HQ uses AC-GND as a common NF pin for all amplifiers, thus requiring that the ratio of input capacitance C1 to AC-GND capacitance C6 be 1:4. Powering up the IC initiates the charging of C1 and C6. If the IC is turned off before the charging of C1 and C6 completes, the input DC balance becomes unbalanced, causing a pop noise to be produced. ...

Page 8

... Ensuring that the parameter values remain within these specified ranges during device operation will help to ensure that the integrity of the device is not compromised. Symbol Rating Unit (surge (DC (opr (peak) P (Note 5) 125 W D −40~85 T °C opr −55~150 T °C stg 8 TB2905HQ 2005-08-17 ...

Page 9

... V L MUTE: ON MUTE: ON  = 7.75 Vrms → Mute: ATT M V OUT OFF Rpull- kΩ, +V= 5.0 V  V Based on normal output DC off-set voltage 9 TB2905HQ Min Typ. Max  200 300   47   43   29   ...

Page 10

... OUT1 (−) OUT2 (+) IN2 PW-GND2 OUT2 (−) OUT3 (+) IN3 PW-GND3 OUT3 (−) OUT4 (+) IN4 PW-GND4 OUT4 (−) OFF-SET RIP STBY MUTE CLP-DET kΩ TB2905HQ 3.3V PLAY 1 MUTE : PRE-GND ...

Page 11

... Ω ch kHz 0.1 100 Hz 1 kHz 0.01 100 0.1 100 Ω ch 0.1 0.01 100 0.1 11 TB2905HQ T.H.D – P (OUT) OUT 1 10 100 Output power P (W) OUT T.H.D – P (OUT) OUT 100 Output power P (W) OUT 2005-08-17 ...

Page 12

... 13 Ω ch 0.1 0.01 100 0.1 100 Ω ch 13 0.1 0.01 100 0.1 12 TB2905HQ T.H.D – P (OUT) OUT 10 kHz 100 Hz 1 kHz 1 10 100 Output power P (W) OUT T.H.D – P (OUT) OUT 13 100 Output power P ...

Page 13

... 13 Ω −10 V OUT = 0dBm (0.775 Vrms 620 Ω −20 −30 −40 −50 CT (3-2) −60 CT (3-4) −70 100000 10 13 TB2905HQ T.H.D – f OUT 1/3 OUT 2/4 0 100 Frequency (Hz) C.T. – f (OUT2) CT (2-1) CT (2-3) CT (2-4) 100 1000 10000 100000 Frequency (Hz) C.T. – f (OUT4) CT (4-1) ...

Page 14

... ∞ 450 Vin = 0 400 350 300 250 200 150 100 50 0 100 TB2905HQ R.R. – f 1ch 3ch 2ch 4ch 0 100 周 波 数 f (kHz) P – OUT 13 100 Output power P ...

Page 15

... P MAX –Ta D 120 ① INFINITE HEAT SINK RθJC = 1°C/W HEAT SINK (RθHS = 3.5°C/W) 100 ② RθJC + RθHS = 4.5°C/W ③ NO HEAT SINK 80 RθJA = 39°C/W ① ② ③ 100 125 周囲温度 Ta (°C) 150 15 TB2905HQ 2005-08-17 ...

Page 16

... Package Dimensions Weight: 7.7 g (typ.) 16 TB2905HQ 2005-08-17 ...

Page 17

... The product is often the final stage (the external output stage circuit. Substandard performance or malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the product. 17 TB2905HQ 030619EBF 2005-08-17 ...

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