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参数资料
| 型号： | LB8109M |
| 元件分类： | 运动控制电子 |
| 英文描述： | DISK DRIVE MOTOR CONTROLLER, 0.8 A, PQFP44 |
| 封装： | QFP-44 |
| 文件页数： | 6/9页 |
| 文件大小： | 640K |
| 代理商： | LB8109M |
LB8109M
No. 5233-6/9
Continued from preceding page.
Pin No.
Symbol
Equivalent circuit
Function
Continued on next page.
Constant-current feedback input pin
for the charging circuit. The charging
current is determined by comparing
this input voltage and the internal
reference voltage (0.35 V typ.).
Connection pin for the resistor that is
used to set the voltage for the
external step-down circuit. This
prevents invalid current at no power
supply.
GND pin for small-signal block.
(GND except output power Tr)
Input pin for the free-running
oscillation circuit that is used to
operate the PWM step-down circuit
and step-up circuit. The oscillating
frequency is determined by external
CR.
CR power supply pin that is used to
prevent invalid current for the
oscillation circuit in standby mode.
Voltage feedback input pin for the
external power supply step-down
circuit. VCC for playback is set by
comparing this pin voltage with the
internal reference voltage (1.28 V
typ.).
Voltage feedback input pin for the
external power supply step-down
circuit. VCC for charging is set by
comparing this pin voltage with the
internal reference voltage (1.28 V
typ.).
Voltage feedback input pin for the
step-up circuit. The step-up voltage is
determined by comparing this pin
voltage with the internal reference
voltage (1.28 V typ.).
Connection pin for the resistor that is
used to set the voltage of the step-up
circuit. This prevents invalid current in
standby mode.
6
13
7
8
9
11
12
18
19
CHG MON
EXTBASE
GND
OSC
OSCPWR
VEXT
VEXTCHG
VASP
UPBASE
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