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One chip driver for slim CD-ROM/RW, DVD-ROM
BH6546KV
Description BH6546KV is a 4-channel PWM driver that drives spindle/slide motor, and focus/track actuator coil of optical disc. In high speed and 180 PWM driving slim disc, the spindle driver can achieve low vibration/low noise.
9.0 0.2 7.0 0.1
37 48 1
Dimension (Units : mm)
9.0 0.2 7.0 0.1 0.5 0.15 0.08 M
36 25 24 13
Features 1) Low vibration/low noise by 180 PWM driving 2) Charge-pump circuit is not necessary for output due to complement power MOSFET. 3) Low power consumption due to low ON resistance Spindle driver output: 0.5 (Typ.) Slide/Focus/Tracking driver output: 1.2 (Typ.) 4) 1 phase/3 phase FG output can be switched by FG switching pin. 5) VQFP48C contributes to make the set smaller and thinner. Applications CD-ROM, CD-RW, DVD-ROM Absolute Maximum Ratings (Ta=25C)
Parameter Power MOS supply voltage Control circuit supply voltage Maximum output current Power dissipation Operating temperature range Storage temperature range Symbol PVcc Vcc IoMAX Pd Topr Tstg Limits 6 6 3 1 1.18 2 -30 ~ +85 -55 ~ +150 Unit V V A W C C
1.6Max.
0.75
12
0.145 -0.03 4 +6 -4 0.08 S
1.4 0.05
0.1 0.05
0.5 0.1 0.22 -0.04
+0.05
VQFP48C
1 Intermittent current at maximum applied time of 5msec, 1/10 duty (Max.) 2 Derating : 9.5mW/C for operation above Ta=25C
On less than 3% (percentage occupied by copper foil), 70mmx70mm, t=1.6mm, glass epoxy mounting.
Recommended Operating Conditions
Parameter Power MOS supply voltage Control circuit supply voltage Ambient temperature Symbol PVcc Vcc Ta Limits 3.0 4.0 -10
~ 5.5 ~ 5.5 ~ +70
Unit V V C
1.0 0.2
+0.05
0.75
Electrical characteristics (Unless otherwise noted; Ta=25C, Vcc=5V, PVcc=5V, Vref=1.65V,
RL(act,SL)=8+47H, RL(SP)=2+47H, RNF=0.33) Symbol IST ICC VDZ1,2 VDZ3 VOO GVC f3CH RON VHI VDZSP gm fSP RONSP VLIMSP VMVref VMVcc Min. -- -- 0 0 -50 12 240 -- 200 2 0.35 65 -- 0.16 -- 3.2 Typ. -- 5 10 20 -- 14 300 1.2 -- 30 0.50 85 0.5 0.20 0.7 3.6 Max. 0.1 10 30 50 50 16 360 2.1 -- 100 0.65 105 1.0 0.24 1.0 4.0 Parameter Current at stand-by mode Current at no signal PWM driver Input dead zone (One side) (CH1,2) Input dead zone (One side) (CH3) Output offset voltage Voltage gain Oscillation frequency Output ON resistance (Top+Bottom) Three phase motor driver Hall input level Input dead zone (One side) I/O gain Oscillation frequency Output ON resistance (Top+Bottom) Output limit voltage Others Vref descent mute Vcc descent mute Unit mA mA mV mV mV dB kHz mVpp mV Arms/V kHz V V V Conditions
Io=500mA
SPRNF=0.33 Io=500mA RNF=0.33
Application Circuit
TRACKING 36 35 34 33
0.1F
FOCUS 31 30 29 28
SLED
M
32
27
26
Pre Driver
25
STBY
Pre Driver
COM
STAND BY
Pre Driver
-
CHANGE FG
37 38 39 40 41 42
24
FGSW
0.01F 0.01F 0.01F Vref IN
23 22 21
0.1F 0.01F
NFamp
Logic
NFamp
Logic
NFamp
Logic
20 OSC T.S.D. FG 3phase REVERSE PROTECT OSC 180deg MATRIX 30deg SHIFT 19 18 17 16 15
Pre Driver Pre Driver
SLED IN FOCUS IN
43 44 45 46
Pre Driver
HALL3
DSP
TRACKING IN SPINDLE IN FG OUT
HALL2
47 48
X5
H.B.
LIMIT
14 13
HALL1
100K Vcc SPRNF 0.33
1
2
3
4
5
0.1F
6
7
8
9
10
11
12
SPINDLE
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0

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