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ICs for Compact Disc/CD-ROM Player
AN8746SA
PWM driver IC for portable CD player
s Overview
The AN8746SA is a 4-channel actuator/motor drive IC by DMOS direct PWM method for a portable CD player.
11.00.3 32 17
Unit: mm
s Features
* RON = 1.8 (typ.) * Supply voltage range (Control block: 2.0 V to 3.6 V, power block: 1.2 V to 3.6 V) * Current at standby (Control block: 1 A or less, power block: 1 A or less) * With an output pin of monitoring 1/2 of the power supply voltage
0.650.10
1.50.2
1
16
6.10.3
8.10.3
(0.5)
0.2+0.10 -0.05
(0.625)
0.65
0.3 -0.05
Seating plane
SSOP032-P-0300
s Applications
* Portable CD player
s Block Diagram
PGND4 PGND3
0.10.1
+0.10
0.650.10
VGO 18 15 N.C.
VM4
32
31
30
29
28
27
26
25
24
23
22
21
20
19
Logic circuit Reset TSD Predriver H bridge H bridge
Logic circuit Predriver VG limiter
VBG
Predriver
VM1 monitor Logic circuit
H bridge
H bridge
Predriver Logic circuit
10
11
12
13
14
MON
Fi1
Ri1
Ro1
PGND1
Fo1
Fo2
PGND2
Ro2
Ri2
Fi2
GND
VM1
VC
VM2
16
1
2
3
4
5
6
7
8
9
17
VM3
Ro4
Ro3
VGI
Fo4
Fo3
Ri4
Ri3
AC
Fi4
Fi3
PC
1
AN8746SA
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VM1 VC MON Fil Ril Rol PGND1 Fo1 Fo2 PGND2 Ro2 Ri2 Fi2 GND N.C. VM2 Description Ch. 1 power supply Control circuit power supply VM1 monitor Ch. 1 forward direction input pin Ch. 1 reverse direction input pin Ch. 1 reverse direction output pin Ch. 1 power ground Ch. 1 forward direction output pin Ch. 2 forward direction output pin Ch. 2 power ground Ch. 2 reverse direction output pin Ch. 2 reverse direction intput pin Ch. 2 forward direction input pin Control circuit ground Ch. 2 power supply
ICs for Compact Disc/CD-ROM Player
Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Symbol VM3 VGO VGI Fi3 Ri3 Ro3 PGND3 Fo3 Fo4 PGND4 Ro4 Ri4 Fi4 PC AC VM4
Description Ch.3 power supply Gate voltage clamp output Gate voltage input pin Ch. 3 forward direction input pin Ch. 3 reverse direction input pin Ch. 3 reverse direction output pin Ch. 3 power ground Ch. 3 forward direction output pin Ch. 4 forward direction output pin Ch. 4 power ground Ch. 4 reverse direction output pin Ch. 4 reverse direction input pin Ch. 4 forward direction input pin Power cut pin All cut-off pin Ch. 4 power supply
s Absolute Maximum Ratings
Parameter Supply voltage Symbol VC VM VGI Supply current Power dissipation
*2 *1
Rating 5 7 8.2 500 400 -30 to +75 -55 to +150
Unit V
IDD PD Topr Tstg
*1
mA mW C C
Operating ambient temperature Storage temperature
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: Use within the range of PD = 390 mW or less at Ta = 75C, following the allowable power dissipation characteristic curve of "s Application Notes".
s Recommended Operating Range
Parameter Supply voltage Symbol VC VM VGI Signal input voltage VIN Range 2.0 to 2.4 to 3.6 1.2 to 2.4 to 3.6 VM +3.5 to 7.0 to 8.0 0 to VC V Unit V
2
ICs for Compact Disc/CD-ROM Player
AN8746SA
s Electrical Characteristics at VC = 2.4 V, VM12 = VM34 = 2.4 V, VGI = 7.0 V, AC = PC = 2.4 V, RL = 8 , Ta = 25C
Parameter Power supply current at mute (at PC = L or VC = L) *1 Control supply current at all cut (at AC = L or PC = L) Control supply current at operating *2 Pre-driver supply current at all cut (at AC = L) *2 Pre-driver supply current at operation (at VGI = 7 V) *2 PWM input voltage high-level PWM input voltage low-level PWM input current high-level PWM input current low-level Driver on resistance (upper and lower) Output propagation delay time at rising *2 Output propagation delay time at falling *2 Output propagation delay time difference tDr-tDf Minimum input pulse width *3 VM monitor output voltage width VM monitor output gain Power output pin flow-out/in current at low VC *1 VM monitor output voltage at VC limit Symbol IMO ICO IC IGO IG VINH VINL IINH IINL RON tDr tDf tD tmin VMON GMON IHZ Conditions PC = 0 V, AC = VC = 2.4 V or VC = PC = AC = 0 V AC = L, PC = L AC = PC = VC = 2.4 V AC = 0 V AC = PC = VC = 2.4 V AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = H AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = L AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = H AC = PC = VC = 2.4 V Fil to Fi4 = Ril to Ri4 = L AC = PC = VC = 2.4 V AC = PC = VC = 2.4 V AC = PC = VC = 2.4 V AC = PC = VC = 2.4 V AC = PC = VC = 2.4 V AC = PC = VC = 2.4 V AC = PC = VC = 2.4 V AC = PC = VC = 0 V Min VC - 0.6 -1 - 0.3 0.3 1.1 0.45 -50 1.7 Typ 0.5 0.5 1.8 0.2 0.2 1.2 0.5 1.9 Max 1 1 1 1 1 0.6 1 2.5 1 1 0.3 1.3 0.55 50 2.1 Unit A A mA A mA V V A A s s s s V A V
LMON VM12 = VM34 = 5.0 V AC = PC = VC = 1.9 V
Note) *1: AC pin and PC pin are connected to VC pin via a protective diode. AC pin and PC pin must be set to 0 V at VC = 0 V to avoid excessive flow-in current. 2: Measure at f = 44.1 kHz and in duty ratio = 50%. * *3: Measure at f = 44.1 kHz. Output pulse width must be tmin /2.
3
AN8746SA
ICs for Compact Disc/CD-ROM Player
s Electrical Characteristics at VC = 2.4 V, VM12 = VM34 = 2.4 V, VGI = 7.0 V, AC = PC = 2.4 V, RL = 8 , Ta = 25C (continued)
* Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter Thermal protection Thermal protection operating temperature Thermal protection hysteresis width
Symbol
Conditions
Min
Typ
Max
Unit C C
TTHD TTHD
145 20
s Usage Notes
1. Care should be taken so as not to cause any of the following conditions on use of this IC. If the following conditions come up, the IC is likely to break down or to be smoking. Short-circuit between output pins Short-circuit between output pin and GND Short-circuit between output pin and power supply (Output pin refers to any of those Fo1 (pin 8), Ro1 (pin 6), Fo2 (pin 9), Ro2 (pin 11), Fo3 (pin 24), Ro3 (pin 22), Fo4 (pin 25), Ro4 (pin 27). GND refers to any of those GND (pin 14), PGND1 (pin 7), PGND2 (pin 10), PGND3 (pin 23), PGND4 (pin 26). Power supply refers to any of those VC (pin 2), VGI (pin 19), VM1 (pin 1), VM2 (pin16), VM3 (pin 17), VM4 (pin 32). 2. VM1 monitor pin (pin 3) outputs approximately one half of VM1 voltage and its upper limit is VC supply voltage. This is meant to prevent the DSP connected to this Pin from damage when the voltage exceeding an operating supply voltage range is inputted to the VM1 pin. On use of this pin, therefore, note that no value exceeding VC is outputted.
s Application Notes
1. PD Ta curves of SSOP032-P-0300 PD T a
1.400 1.288 1.200 Mounted on standard board (glass epoxy: 50 mm x 50 mm x t0.8 mm) Rth(j-a) = 97.0C/W
Power dissipation PD (W)
1.000
0.800
0.667 0.600 Independent IC without a heat sink Rth(j-a) = 187.2C/W
0.400
0.200
0.000 0
25
50
75
100
125
150
Ambient temperature Ta (C)
4
ICs for Compact Disc/CD-ROM Player
s Application Notes
2. Logic table of driver VC H H H H H L PC H H H H L X Fil to Fi4 L L H H X X Ril to Ri4 L H L H X X Fol to Fo3 L L H L L Hi-Z Rol to Ro3 L H L L L Hi-Z
AN8746SA
Fo4 L L L H L Hi-Z
Ro4 L H L L L Hi-Z
Note) AC = H on the above logic table. H stands for VC power supply potential, L for GND potential (0 V) and X for H or L. Hi-Z indicates that the driver output pin becomes a high impedance state. Logic input pin must not be left open. And do not apply any other voltages than H or L.
s Application Circuit Example
DSP Microcomputer
M M
VGI = 7 V
26 PGND4
23 PGND3
18 VGO 15 N.C.
32 VM4
Logic circuit Reset TSD Predriver H bridge H bridge
Logic circuit Predriver VG limiter
VBG
Predriver
VM1 monitor Logic circuit
H bridge
H bridge
Predriver Logic circuit
PGND2 10
Ro2 11
Ri2 12
Fi2 13
GND 14
VM1 1
MON 3
PGND1 7
DSP VC = 2.4 V/0 V VM = 2.4 V
VM2 16
5
VC 2
Fi1 4
Ri1 5
Ro1 6
Fo1 8
Fo2 9
17 VM3
27 Ro4
22 Ro3
19 VGI
25 Fo4
24 Fo3
28 Ri4
21 Ri3
31 AC
29 Fi4
20 Fi3
30 PC

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