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參數(shù)資料
| 型號： | LB8118M |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | QIP-44 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 113K |
| 代理商： | LB8118M |
Ordering number: ENN5838A
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Actuator Driver for Portable CD Players
LB8118M
Monolithic Digital IC
10903AS (II)/D3097HA (II) No.5838-1/11
Overview
The LB8118M is an actuator driver IC designed for
portable CD players that operate at 2.4 V (two Ni-Cd
batteries) or 3.0 V (two dry cells). Because the four-
channel driver control outputs are divided into two groups,
this device reduces power dissipation considerably during
double-speed play.
Package Dimensions
unit: mm
3148-QIP44MA
[LB8118M]
SANYO: QIP44MA
2.8max
0.8
11.6
0.35
10.0
13.2
1.0
1
11
12
22
23
33
34
44
1.0
1.6
0.8
2.5
0.2
0.1
10.0
13.2
1.0
1.6
0.8
Functions and Features
H bridge drivers on chip for four channels to drive each CD actuator (the focus coil, the tracking coil, the spindle motor,
and the sled motor).
Step-up circuit (voltage to be set by an external resistor) on chip that is used to apply voltage to the CD DSP, ASP and
microcontroller. Center-tap coil for step-up circuit makes it possible to supply the driver control voltage. (However, the
drive Tr, L, C, and Di are all external.)
Oscillator circuits for each converter on chip. (C is external.)
Four-channel driver control output is divided into two groups (the focus/tracking group and the spindle/sled group) for
minimum loss at double-speed playback. Highest operating voltage detected in each group is supplied for each 2ch H
bridge driver after PMW conversion. The single channel PWM drive without dividing the outputs into two groups is also
possible. (However, the PWM PNP-Tr, NPN-Tr, L, C, and Di are all external.)
The dynamic range of 4-channel H bridge driver output voltage is up to 2 V on the focus and tracking side, and can be
set by the VoSET pin on the spindle and sled side. However, if the 4-channel H bridge voltages in the H bridge driver
block are the same, the maximum voltage is determined using the VoSET pin.
Sled motor driving mode is switchable between step drive mode for lower power dissipation, and normal V-type drive
mode. (The other three channels are fixed to V-type.)
In the spindle motor drive circuit, the control gain can be set higher for double-speed playback.
Continued on next page.
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