BD7904FS ROHM Co. Ltd., BD7904FS Datasheet - Page 10

• Manufacturer Part Number: BD7904FS
• Description: 5ch Power Driver For Cd-rom, Dvd-rom
• Manufacturer: ROHM Co. Ltd.

   
Designation
Circuit current
Sled driver block
RONUSL
RONLSL
VDZSL
ILIMSL
gmSL
IST1
IST2
fosc
IQ1
IQ2
IQ3
∗2 Sled driver
VIN4
gm (+) = (
gm (−) = (
VIN1=240mV, VIN2=140mV
VIN3=−140mV, VIN=−240mV
VRNF4/RNF
Ω
INPUT
(3.3V)
VIN3
3.3V
3.3V
(0V)
(0V)
1.45
VIN
VSLRNF1 − VSLRNF2
VSLRNF4 − VSLRNF3
0V
*1
*2
VRNF3/RNF
−
−
−
−
−
240mV − 140mV
240mV − 140mV
Dead zone
H
H
H
H
H
H
H
1
L
L
L
L
CTL
lop
VRNF2/RNF
H
H
H
H
H
H
H
H
2
L
L
L
Ω
) / 0.5Ω
) / 0.5Ω
VRNF1/RNF
RL SP SL
1
1
1
1
1
2
2
1
1
2
2
−
VIN2
1
1
1
1
1
1
1
1
1
1
1
SWITCH
VIN1
1
1
1
1
1
1
1
2
2
1
1
SPRNF=0.33Ω
SLRNF=0.5Ω
+
IL OP
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
VIN
∗1 Check VSLRNF with no output at VIN=VC
See bellow
ILSL=500mA
ILSL=−500mA
+
Check VSLRNF with output at VIN=VC±40mV
+
Iosp
Iosl
Iop
∗4 Spindle driver
Ω
Iop...the peak current of Iosp or Iosl
gm (+) = (
gm (−) = (
VIN1=150mV, VIN2=100mV
VIN3=−100mV, VIN=−150mV
Conditions
RON=
VSPRNF1 − VSPRNF2
VSPRNF4 − VSPRNF3
RON=
150mV − 100mV
150mV − 100mV
12V − VOSL + (−)
Ω+ µ
VOSL + (−)
0.5A
0.5A
) / 0.33Ω
) / 0.33Ω
Time
Iosp or Iosl
Ω+ µ
OUT+ (−)
OUT+ (−)
VSLRNF
VSLRNF
VSLRNF
Measure
VOSL+
IQVC
IQVC
IQDV
IQVC
IQDV
point