TDA7278 STMicroelectronics, TDA7278 Datasheet - Page 4

• Manufacturer Part Number: TDA7278
• Description: Audio DSPs CD Actuator Driver
• Manufacturer: STMicroelectronics

Specifications of TDA7278

• Mounting Style: SMD/SMT
• Package / Case: PQFP-44
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7278
ELECTRICAL CHARACTERISTICS (T
(1): all the 4 PWM outputs switched off.
(2) T
(3) All the 4 PWM output switched OFF, auxiliary and main DC/DC converters polarized but not switching
4/15
V
Symbol
CPU
To avoid reset, the frequency of watch dog pulses must be greater than (3 T
V
V
RESET
V
AV
Z
HIGH
BAT
K
BG
IN
(adj)
= width of the Reset pulse on pin 19 = K C, where C is the capacitance on pin 20 (C
Power Supply
Power Supply
Current Consumption from
V
Current Consumption from
V
Leakage Current in stand-
by condition
Output Voltages
R
Max Output Current from
V
Voltage Ripple on V
Oscillator - free freq.
H_bridge
PWM Circuit
Reference Voltage
Load Regulation
Line Regulation
Bridge gain
Reset Time Coefficient
Error Impedance Inputs
V
V
WINDIP Impedance
BEMP & BLOW
intervention threshold
RESET Voltage Saturation
VCON Voltage Saturation
CPU
BAT
ON
CPU
REF2
REF1
- Ron, actuators (CH 1,3)
- Ron, motors (CH 2,4)
- Ron, actuators
- Ron, motors
ofDC/DC Converter Switch I = 1A
(3)
(1)
(T
(T
Load Regulation
Impedance
Parameter
amb
amb
- sync. freq
-
= 25 to 70 C)
= 25 to 60 C)
free freq.
CPU
Config. in fig. 3a: V
Config. in fig. 3a: V
Config. in fig. 3b
Config. in fig. 3c
Stand-by condition
Config. in fig 3a
Config. in fig. 3a
Config. in fig. 3b
Config. in fig. 3c
Stand-by condition
Config. in fig 3a
V
V
V
STCAP = 470pF
.
I = 100mA
I = 100mA
I
V
From Error to H
note 2
I
I
I
I
LOAD
LOAD
LOAD
LOAD
LOAD
V
amb
CPU
BAT
CPU
BAT
BAT
= 1.6 to 5V
=-10 to+10 A;
=-1 to+1mA
=-100 A
=-100 A
=100 A
= 5V
= 5V
< 4.5V Config. fig 3a
Test Condition
= 1.6 to 5V
= 25 C, V
IN
BAT
CPU
CPU
= 1.6V unless otherwise specified)
<4V
>4V
RESET
V
V
V
)
V
-1
CPU
CPU
CPU
BAT
Min.
1.22
0.55
150
–30
-30
1.6
1.6
1.6
1.6
1.6
2.4
2.8
7.4
80
26
-200
+0.3
+0.3
+4
RES
).
V
Typ.
BAT
1.28
0.65
0.25
200
750
1.0
1.6
0.5
0.8
3.6
1.5
11
40
30
5
+7
V
BAT
Max.
V
V
1.25
1.34
17.2
0.75
180
200
200
5.5
0.4
1.6
2.5
0.8
4.5
20
20
30
30
30
CPU
CPU
4
4
4
4
5
5
5
+12
msec/ F
Unit
KHz
KHz
KHz
mA
mA
mA
mV
mV
mV
mV
mV
mV
k
k
k
V
V
V
V
V
V
V
V
V
V
V
V
V
A