an8725fh Panasonic Corporation of North America, an8725fh Datasheet - Page 7

• Manufacturer Part Number: an8725fh
• Description: Semiconductor Laser Power Control Ic
• Manufacturer: Panasonic Corporation of North America

ICs for Optical Disk Drive
Pin No.
Pin Descriptions (continued)
64
65
66
67
68
69
70
71
72
73
74
75
76
77
PKGND
Symbol
XLDPK
PKDCP
RDCP2
XLDBI
BIGND
PKV
LDRP
LDPK
BIV
LDBI
RV
N.C.
N.C.
CC
CC
CC
MSC
MSC
OUT
OUT
OUT
PS
IN
PS
PS
IN
PS
PS
Category
A
A
A
A
A
A
A
A
A
A
A
A
Pin to connect a de-coupling capacitor to protect the output current of
DAC7, the read current setting circuit, from disturbance by a switching
noise such as peak current.
(Connects a capacitor between RDCP2 and RGND.)
Source type read current (DAC1, DAC7, DAC8, DAC9) output pin.
Possible to set up the range of 0 mA to 150 mA in the precision of 8-bit
Output voltage range is 1.0 V to 3.5 V.
N.C. pin.
Open the pin or connect to GND.
Power supply pin for read current setting DAC7, DAC8.
Consumes approximately a quarter of the necessary read current.
Must be used in the same potential as other power supply pins.
Source-type peak current (DAC2) output pin.
Possible to set the range of 0 mA to 150 mA in the accuracy of 8-bit.
The output voltage range is 1.0 V to 3.2 V.
Sink-type peak current output pin.
Approximately three fourths of LDRK output current are outputted from
this pin.
GND pin of DAC2 in the peak current setting circuit.
Must be used in the same potential as other GND pins.
DAC2 power supply pin in the peak current setting circuit.
Consumes approximately a quarter of the setting current.
Must be used in the same potential as other power supply pins.
Pin to connect a de-coupling capacitor to avoid the output current disturbance,
which is caused by a switching noise such as peak current, in peak current
setting circuit DAC2.
(Connects a capacitor between PKDCP and PKGND.)
Source-type bias current (DAC3) output pin.
Possible to set the range of 0 mA to 150 mA in the accuracy of 8-bit.
Output voltage range is 1.0 V to 3.2 V.
Approximately three fourths of LDBI output current are outputted from
this pin.
GND pin of a bias current setting circuit DAC3.
Must be used in the same potential as other GND pins.
Power supply pin of a bias current setting circuit DAC3.
Consumes approximately one fourth of a setting current.
Must be used in the same potential as other power supply pins.
Sink-type peak current output pin.
4-bit
5-bit
4-bit.
Description
AN8725FH
7