BD7902 데이터 시트보기 (PDF) - Unspecified

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BD7902

6CH Power Driver for CD-ROM, DVD-ROM

Unspecified 

Optical disc ICs

BD7902CFS

!Table of measure circuit switches position 2

(VCC=SPVM=SLVM=12V, DVCC=AVM=5V, VC=1.65V, RL (act) =8Ω, RL (SL) =8Ω+47µH, RL (SP) =2Ω+47µH,

SLRNF=0.5Ω, SPRNF=0.33Ω, 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,

HW+=2.7V (2.3V), HV=2.5V

IU+ (−),

IV+ (−),

IW+ (−)

〈 Torque command 〉

VDZSP

gmSP

∗3

L

H

2

1

1

1

∗2 Check VRNF with no output at VIN=VC±20mV

Check VRNF with output at VIN=VC±90mV

∗4 L H 2 1 1 1 See 15 of 20

VSPRNF

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

ILIMSP

3.3V H 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 HW+=2.4V

VFG

VFGL

1.65V H H 1 1 1 1 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

Hi-Z

Sink

Source

Hi-Z

V

Hi-Z

Source

Sink

Hi-Z

Sink

Source

W

Sink

Hi-Z

Source

Source

Hi-Z

Sink

Condition

IOSPU=500mA

IOSPV=500mA

IOSPW=500mA

IOSPU=−500mA

IOSPV=−500mA

IOSPW=−500mA

Measure point

VOSPU

VOSPV

VOSPW

VOSPU

VOSPV

VOSPW

11/17

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