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参数资料
| 型号： | TDA7278 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封装： | 10 X 10 MM, PLASTIC, QFP-44 |
| 文件页数： | 10/15页 |
| 文件大小： | 276K |
| 代理商： | TDA7278 |
ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VBAT = 1.6V unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VBAT
Power Supply
(Tamb = 25 to 70°C)
Config. in fig. 3a: VCPU <4V
Config. in fig. 3a: VCPU >4V
Config. in fig. 3b
Config. in fig. 3c
Stand-by condition
Config. in fig 3a
1.6
VCPU +0.3
1.6
VCPU
4
V
Power Supply
(Tamb = 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
VCPU +0.3
1.6
VCPU
5
5.5
V
Current Consumption from
VCPU (1)
VCPU = 5V
5
mA
Current Consumption from
VBAT (3)
1.5
mA
Leakage Current in stand-
by condition
VBAT = 5V
20
A
VHIGH
VCPU (adj)
Output Voltages
VBAT +4
2.4
VBAT +7
VBAT +12
5
V
RON of DC/DC Converter Switch I = 1A
0.25
0.4
Max Output Current from
VCPU
VCPU < 4.5V Config. fig 3a
150
mA
Voltage Ripple on VCPU
Oscillator - free freq.
- sync. freq
-
free freq.
STCAP = 470pF
.
VBAT = 1.6 to 5V
80
200
180
20
KHz
H_bridge
- Ron, actuators (CH 1,3)
- Ron, motors (CH 2,4)
I = 100mA
1.0
1.6
2.5
PWM Circuit
- Ron, actuators
- Ron, motors
I = 100mA
0.5
0.8
1.25
VBG
Reference Voltage
1.22
1.28
1.34
V
Load Regulation
ILOAD = -10 to +10
A;
-30
30
mV
Line Regulation
VBAT = 1.6 to 5V
30
mV
AV
Bridge gain
From Error to HIN
2.8
3.6
4.5
K
Reset Time Coefficient
note 2
7.4
11
17.2
msec/
F
ZIN
Error Impedance Inputs
26
40
k
VREF2 Load Regulation
ILOAD = -1 to +1mA
–30
30
mV
VREF1 Impedance
750
k
WINDIP Impedance
30
k
BEMP & BLOW
intervention threshold
0.55
0.65
0.75
V
RESET Voltage Saturation
ILOAD = -100
A200
mV
VCON Voltage Saturation
ILOAD = -100
A
ILOAD = 100
AVCPU-200
200
mV
(1): all the 4 PWM outputs switched off.
(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
TDA7278
4/15
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