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參數(shù)資料
| 型號： | UA1538 |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | 4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
| 中文描述： | 4通道馬達驅(qū)動便攜式CD播放器 |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 370K |
| 代理商： | UA1538 |
UA1538
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
15
www.unisonic.com.tw
QW-R109-023,B
CIRCUIT OPERAT ION
1 H-bridge driver block
(1) Gain setting
·
The driver input resistance (ch 1,3 and 4) are 11k
following formula.
ch1
ch2
ch3
typ. ,ch2 is 7.5k
typ. . Set the gain according to the
ch2
GV=20 log
GV=20 log
55k
11k+R
110k
7.5k+R
(db)
(db)
R:Externally-connected input
·
The driver output stage power supply is HVcc (36PIN), and the bridge circuit power supply is VSYS2
(15PIN). Connect a bypass capacitor between these two power supplies (approximately 0.1
F).
(2) Mute function
·
Of the four drivers,ch1 has a brake function, and the other channels have a mute function.
·
When BRAKE1(23PIN)is set to high level, both ch1 outputs go low level, and the circuit enters brake mode.
·
When MUTE2(21PIN)is set to high level, the ch2 output is muted.
·
When MUTE34(19PIN)is set to high level, the ch3 and 4 outputs are muted.
(3) Vref drop mute
·
When the voltage applied to Vref (16PIN)is 1.0V or less typ. , the driver outputs are set to high impedance.
(4) Thermal shutdown
·
When the chip temperature reaches 150
typ. the output current is cut. The chip starts operating again at
about 120
typ. .
2 PWM power supply drive block
·
This detects the maximun output level from among the four channels, and supplies the load drive power
supply (36PIN)for the PWM. The external components are a PNP transistor, coil, Schottky diode, and
capacitor.
33
H
PWMFIL
PSW
HVcc
2200pF
100k
47k
44
37
BATT
10pF
SBD
47
F
+
0.1
F
36
3 DC-DC converter block
(1) Output voltage
·
3.2V typ. voltage multiplier circuit can be constructed using external components. This voltage can be
varied with the addition of an external resistor. The setting method is as follows.
R1
·
R3
R1 + R3
R2 + R4
(V)
VSYS1=1.2
×
R2
·
R4
R2
·
R4
R2 + R4
+
相關PDF資料 |
PDF描述 |
|---|---|
| UA1538L-QM1-T | 4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
| UA1538-QM1-T | 4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
| UA2311 | 16 BITS DIGITAL to ANALOG CONVERTER |
| UA2311-D08-T | 16 BITS DIGITAL to ANALOG CONVERTER |
| UA2311L-D08-T | 16 BITS DIGITAL to ANALOG CONVERTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UA1538_11 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
| UA1538G-QM1-Y | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
| UA1538L-QM1-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
| UA1538L-QM1-Y | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
| UA1538-QM1-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS |
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