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參數(shù)資料
| 型號： | TDA7278 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | High-Efficiency CD Actuator Driver(高效率CD驅(qū)動器) |
| 中文描述： | 高效率的CD驅(qū)動器（高效率光盤驅(qū)動器） |
| 文件頁數(shù)： | 3/15頁 |
| 文件大?。?/td> | 141K |
| 代理商： | TDA7278 |
PIN FUNCTIONS
N
o
Name
Function
21
WDINP
Watch dog input - AC coupled to WD
μ
controller output
(Disabled when connected to GND)
Start up reset control for
μ
C & watch dog time constant
Reset output command to
μ
C (open collector)
Battery empty comparator input
Watch dog & reset
circuit
20
CRES
19
RESET
41
BEMP
Battery control circuit
40
BLOW
Battery low comparator input
39
VCON
Battery level control output
VCON = Z VBEMP > VBCON > VBG
VCON = 1 VBEMP > VBG > VBLOW
VCON = 0 VBG > VBEMP > VBLOW
24
ENABLE
General Enable Input (active Low)
Band Gap Reference
18
VBG
Reference voltage capacitor
12
SSCAP
Soft start capacitor
VCPU DC-DC
converter
16
OUT 1
Switching transistor terminal high
17
OUT 2
Switching transistor terminal low
15
VCPU
Regulated voltage
14
IRC
Error amplifier output
13
INP
Error amplifier inverting input
11
VHIGH
Regulated Voltage
Vhigh Boost DC-DC
Converter
10
OUT
Switching transistor output
22
STCAP
Sawtooth toth
Oscillator
23
SYNC
Oscillator synchronizing input
4, 30
V
BAT
GND
Power supply voltage
6, 28
Power ground
38
VREF 2
Buffered reference output voltage
37
VREF 1
Reference input voltage
5
FLIN 1
Switching Output
Focus actuator step
down converter
& H bridge
7
HOUT 1A
H bridge positive output
8
HIN 1
Regulated voltage H bridge supply
9
HOUT 1B
H bridge negative output
43
ERROR 1
Error input
29
FLIN 3
Switching Output
Tracking actuator
step down converter
& H bridge
27
HOUT 3A
H bridge positive output
26
HIN 3
Regulated voltage H bridge supply
25
HOUT 3B
H bridge negative output
35
ERROR 3
Error input
3
FLIN 2
Switching output
Spindle motor step
down converter
& H bridge
2
HOUT2A
H bridge positive output
1
HIN 2
Regulated voltage H bridge supply
44
HOUT 2B
H bridge negative output
42
ERROR 2
Error input
TDA7278
3/15
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