TDA7278 Datasheet, PDF (4/15 Pages) STMicroelectronics – HIGH-EFFICIENCY CD ACTUATOR DRIVER

TDA7278
ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VBAT = 1.6V unless otherwise specified)
Symbol
V_BAT
Parameter
Power Supply
(T_amb = 25 to 70°C)
Test Condition
Config. in fig. 3a: V_CPU <4V
Config. in fig. 3a: V_CPU >4V
Config. in fig. 3b
Config. in fig. 3c
Stand-by condition
Config. in fig 3a
Min.
1.6
1.6
V_CPU +0.3
1.6
Typ.
Max.
V_CPU
4
4
4
4
Power Supply
(T_amb = 25 to 60°C)
Config. in fig. 3a
Config. in fig. 3b
Config. in fig. 3c
Stand-by condition
Config. in fig 3a
1.6
V_CPU +0.3
1.6
V_CPU
5
5
5.5
Current Consumption from
V_CPU (1)
Current Consumption from
V_BAT (3)
Leakage Current in stand-
by condition
VCPU = 5V
VBAT = 5V
5
1.5
20
V_HIGH
V_CPU (adj)
V_BG
AV
K
Output Voltages
R_ON of DC/DC Converter Switch
Max Output Current from
V_CPU
Voltage Ripple on V_CPU
Oscillator - free freq.
- sync. freq
- ∆ free freq.
H_bridge
- Ron, actuators (CH 1,3)
- Ron, motors (CH 2,4)
PWM Circuit
- Ron, actuators
- Ron, motors
Reference Voltage
Load Regulation
Line Regulation
Bridge gain
Reset Time Coefficient
I = 1A
VCPU < 4.5V Config. fig 3a
STCAP = 470pF
.
V_BAT = 1.6 to 5V
I = 100mA
I = 100mA
I_LOAD =-10 to+10µA;
V_BAT = 1.6 to 5V
From Error to H_IN
note 2
V_BAT +4
2.4
150
80
1.22
-30
2.8
7.4
V_BAT +7
0.25
V_BAT +12
5
0.4
200
180
20
1.0
1.6
1.6
2.5
0.5
0.8
0.8
1.25
1.28
1.34
30
30
3.6
4.5
11
17.2
Z_IN
Error Impedance Inputs
V_REF2 Load Regulation
V_REF1 Impedance
WINDIP Impedance
I_LOAD =-1 to+1mA
26
40
–30
30
750
30
BEMP & BLOW
intervention threshold
RESET Voltage Saturation
VCON Voltage Saturation
I_LOAD =-100µA
I_LOAD =-100µA
I_LOAD =100µA
0.55
0.65
V_CPU-200
0.75
200
200
(1): all the 4 PWM outputs switched off.
Unit
V
V
V
V
V
V
V
V
V
mA
mA
µA
V
V
Ω
mA
KHz
KHz
KHz
Ω
Ω
Ω
Ω
V
mV
mV
msec/µF
kΩ
mV
kΩ
kΩ
V
mV
mV
mV
(2) TRESET = width of the Reset pulse on pin 19 = K ⋅ C, where C is the capacitance on pin 20 (CRES).
To avoid reset, the frequency of watch dog pulses must be greater than (3 ⋅ TRESET)^-1
(3) All the 4 PWM output switched OFF, auxiliary and main DC/DC converters polarized but not switching
4/15