BD7905BFS Datasheet, PDF (11/18 Pages) Rohm – 6CH Power Driver for CD-ROM, DVD-ROM

Optical disc ICs
BD7905BFS
!Table of measure circuit switches position 2
(VCC=SPVM=SLVM=12V, DVCC=AVM=5V, VC=1.65V, RL (SL) =8Ω+47µH, RL (SP) =2Ω+47µH, RL (ACT, LD) =8Ω,
SLRNF=0.5Ω, SPRNF=0.22Ω, H−=2.5V, HU+=2.6V, HV+=HW+=2.4V)
INPUT CTL
SWITCH
Designation
VIN 1 2 RL SP SL IL
Conditions
Measure
point
Spindle driver block
〈 Hall bias 〉
VHB
1.65V H H 1 1 1 1 IHB=10mA
Pin 7
〈 Hall amplifier 〉
IHIB
1.65V
H
H
1
1
1
1
Current flowing in each terminal at H−=2.5V,
H+=2.6V (2.4V)
〈 Torque command 〉
VDZSP1
∗3
VDZSP2
∗3
gmSP1
∗4
H
H
2
1
1
1
∗3 Check VRNF with no output at VIN=VC
Check VRNF with output at VIN=VC+40mV
L
H
2
1
1
1
∗3 Check VRNF with no output at VIN=VC
Check VRNF with output at VIN=VC±120mV
H H 2 1 1 1 See 10 of 17
IU+ (−),
IV+ (−),
IW+ (−)
VSPRNF
VSPRNF
VSPRNF
gmSP2
∗4 L H 2 1 1 1 See 10 of 17
VSPRNF
RONUSP 3.3V H H 1 2 1 2 ^ILSP=500mA
RON
=
12V − VOSP
0.5A
OUTU, V, W
RONLSP
3.3V H H 1 2 1 2 ^{ILSP=−500mA}
RON =
VOSP
0.5A
OUTU, V, W
ILIMSP1, 2 3.3V H H 2 1 1 1
VSPRNF
ILIMSP1, 2 3.3V L H 2 1 1 1
VSPRNF
fosc
1.85 H H 2 1 1 1
VOSPU
〈 FG 〉
VFGH
1.65V H H 1 1 1 1 HU+=2.6V, HV+=2.4V, HW+=2.4V
VFG
VFGL
1.65V H H 1 1 1 1 HU+=2.6V, HV+=2.4V, HW+=2.6V
VFG
∗5 Condition of input
HU+
HV+
2.4V
2.6V
2.6V
2.4V
2.6V
2.6V
2.6V
2.4V
2.4V
2.6V
2.4V
2.4V
HW+
2.6V
2.6V
2.4V
2.4V
2.4V
2.6V
U
Source
Sink
Middle
Sink
Source
Middle
V
Middle
Source
Sink
Middle
Sink
Source
W
Sink
Middle
Source
Source
Middle
Sink
Condition
IOSPU=500mA
IOSPV=500mA
IOSPW=500mA
IOSPU=−500mA
IOSPV=−500mA
IOSPW=−500mA
Measure point
VOSPU
VOSPV
VOSPW
VOSPU
VOSPV
VOSPW
11/17