Aimtron AT5802 Preliminary 4-channel driver power controller Datasheet

AT5802
Preliminary
4-Channel driver + Power Controller
Features
Description
˙4 channels of Power-Mos H-bridge drivers.
˙Built-in DC/DC converter control circuit.
˙Built-in reset circuit.
˙Built-in VG booster circuit.
˙Built-in voltage down regulator circuit.
˙Built-in On/OFF function
˙Low power consumption.
˙Direct PWM drive system.
˙QFP44 package.
The AT5802 is a 4-channel driver and power
controller for portable CD players on a single
chip. The driver block power supply uses the
on-chip switching regulator, making this
component an ideal choice for low-power sets.
Applications
Disc-man
Portable compact disc players (CDP)
Portable Mini disc player (MD)
Other portable compact disc media
OUT1+
OUT1-
PGND2
PVCC2
OUT2+
OUT2-
OUT3+
OUT3-
PVCC1
PGND1
OUT4+
OUT4-
Block Diagram
33
32
31
30
29
28
27
26
25
24
23
34
PRE-DRIVER
PRE-DRIVER
PRE-DRIVER
22
FIL4
PRE-DRIVER
SPRT
35
21
FIL3
SOFT
36
20
FIL2
CT
37
19
FIL1
DC_IN
38
18
VREF
REGB
39
17
IN4
REGO
40
16
IN3
GND
41
15
IN2
PGND3
42
14
IN1
RESET
13
RESET
MUTE1
12
MUTE1
LG
43
REGULATOR
SWITCH
OUTPUT
VSYS
DETECT
PRE-DRIVER
POWER
SUPPLY
CONVERTER
TRIANG WAVE
DC/DC
CONVERTER
POWER
OFF
STARTER
1
2
3
4
5
6
7
8
9
10
11
EI
EO
N.C.
N.C.
N.C.
START
OFF
CLK
MUTE34
MUTE34
VSYS
44
SW
VG
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
1
AT5802
Preliminary
4-Channel driver + Power Controller
Pin Assignments
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
2
AT5802
Preliminary
4-Channel driver + Power Controller
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Pin name
SW
VSYS
EI
EO
N.C.
N.C.
N.C.
START
OFF
CLK
MUTE34
MUTE1
RESET
IN1
IN2
IN3
IN4
VREF
FIL1
FIL2
FIL3
FIL4
OUT4OUT4+
PGND1
PVCC1
OUT3OUT3+
OUT2OUT2+
PVCC2
PGND2
OUT1OUT1+
SPRT
SOFT
CT
DC_IN
REGB
REGO
GND
PGND3
LG
VG
Function
Booster transistor drive
Control circuit power supply input
DC/DC converter error amplifier input
DC/DC converter error amplifier output
DC/DC converter starting input
DC/DC converter off input
External clock synchronization input
CH3 CH4 mute input
CH1 mute input
Reset output
CH1 input
CH2 input
CH3 input
CH4 input
Reference power supply input
CH1 feedback filter
CH2 feedback filter
CH3 feedback filter
CH4 feedback filter
CH4 negative output
CH4 positive output
Power unit ground 1
H-bridge power supply input 1
CH3 negative output
CH3 positive output
CH2 negative output
CH2 positive output
H-bridge power supply input 2
Power unit ground 2
CH1 negative output
CH1 positive output
Short-circuit protection setting input
Soft-start setting input
Triangular wave output
AC adapter power supply input
TR driving terminal for regulator
Battery power supply input
Pre-Unit Power supply ground
Power unit ground 3
Drive coil for boosting VG terminal
Drive the power-Mos circuit power supply input
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
3
AT5802
Preliminary
4-Channel driver + Power Controller
Absolute maximum ratings (Ta = 25oC)
Parameter
H-bridge power Supply voltage
Battery power Supply voltage
System power Supply voltage
AC adapter power Supply voltage
Pre-driver power Supply voltage
Power dissipation
Operating temperature range
Storage temperature range
o
﹡Derating is done 5mW/ C for operation above Ta=25oC.
Symbol
PVCC1, 2
REGO
VSYS
DC_IN
VG
Pd
Topr
Tstg
Limits
7
7
7
7
7
1000*
-30~+85
-55~+150
unit
V
V
V
V
V
mW
o
C
o
C
Recommended operating conditions (Ta = 25oC)
Parameter
H-bridge power Supply voltage
Battery power Supply voltage
System power Supply voltage
AC adapter power Supply voltage
Pre-driver power Supply voltage*
Ambient temperature
Symbol
PVCC1, 2
REGO
VSYS
DC_IN
VG
Ta
Min.
1.5
1.5
2.0
2.0
5.0
-10
Typ.
2.4
2.4
2.5
4.5
6.0
25
Max.
6.5
6.5
6.5
6.5
6.9
70
unit
V
V
V
V
V
o
C
﹡The built-in booster circuit is not used, but the voltage is supplied from outside.
Electrical characteristics
(Unless specified particular, Ta = 25oC, PVCC1, 2=REGO=2.4V, VSYS=2.5V, VG=6V, VREF=1.25V )
Parameter
Symbol Min.
Typ.
Max.
Unit
Conditions
Common section
REGO stand-by current
VG stand-by current
REGO supply current
DC_IN supply current
VSYS supply current
VG supply current
LG leak current
IREGOST
IVGST
IREGO
IDC_IN
IVSYS
-
0.45
1.4
4.5
3
3
1.0
3.0
9.0
IVG
-
0.35
0.7
ILGLK
-
-
3
μA VSYS=0V
μA VSYS=0V
mA
mA DC_IN=5V
mA
CT=470PF,fCLK=88.2KHz
mA
VIN=1.49V
μA LG=6V, VSYS=0V
PWM driver
Sum of on-resistance of top and
that of bottom
Output on-resistance
RON
-
1.9
4
Ω
Output offset voltage
Output voltage gain
Input dead zone
CH1,2 (one side)
Input dead zone
CH3,4 (one side)
VOO
GVC
-50
11.5
0
14.0
50
16.5
mV
dB
RIN=30KΩ
VDB12
2
20
40
mV
CH1,2
VDB34
0
5
15
mV
CH3,4
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
4
AT5802
Preliminary
4-Channel driver + Power Controller
Parameter
Symbol Min.
Typ.
Max.
Unit
Conditions
Control pin threshold
Mute 1 ON
threshold voltage
Mute 1 OFF
threshold voltage
Mute 34 ON
threshold voltage
Mute 34 OFF
threshold voltage
VMON1
1.5
-
-
V
VMOFF1
-
-
0.5
V
VMON34
-
-
0.5
V
1.5
-
-
V
VMOFF3
4
Up / down voltage converter section
EI pin threshold voltage
EO pin output voltage H
EO pin output voltage L
VEITH
VEOTH
VEOL
SPRT pin voltage(normal)
SPRT pin current 1,EO=H
SPRT pin current 2,
OFF mode
SPRT pin impedance
SPRT pin
threshold voltage
VSPRTN
ISPRT1
0.85
0.90
0.95
V
1.1
1.3
V IEO=100μA
0.4
V IEO=-60μA
Short-circuit protection
0.2
V
μA
3.8
5.8
8.8
ISPRT2
7.5
11.5
17.5
μA
RSPRT
210
300
390
KΩ
VSPRTTH
0.4
0.5
0.6
V
SOFT pin output voltage
SOFT pin current
VSOFT
ISOFT
1.22
3
VOFFTH1
-
OFF pin ON
threshold voltage
OFF pin OFF
threshold voltage
OFF pin bias current
START pin ON
threshold voltage
START pin OFF
threshold voltage
START pin bias current
CLK pin
threshold voltage H
CLK pin
threshold voltage L
CLK pin bias current
LG pin oscillating
frequency
LG pin maximum pulse
duty
LG pin output voltage L
VG pin starter detect
Soft start section
1.67
2.12
6
9
Interface section
VSYS
-1.5
-
-
IOFF
VSYS
-0.6
30
60
VSTATH1
-
-
90
REGO
-1.0
VOFFTH2
VSTATH2
ISTART
VCLKTH
H
VCLKTHL
V
μA SOFT=0V
V
V
μA OFF=0V
V
REGO
-0.3
-
-
-
30
34
1.5
-
-
V
CT=470PF, fCLK=88.2KHz
-
-
0.5
V
CT=470PF, fCLK=88.2KHz
V
μA VSYS=0V,START=0V
ICLK
μA CLK=2.5V
11
16
21
Starter circuit section
fLG
75
100
125
tLGMAX
84
87
90
﹪
VG=LG=5V
VLGL
VVGSTT
-
0.1
0.2
V
VG=LG=5V
3.7
4.5
5.3
V
VG=3.5V→5.5V sweep
H
KHz VG=LG=5V
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
5
AT5802
Preliminary
4-Channel driver + Power Controller
Parameter
Symbol Min.
VG pin threshold voltage
VVGTH
6.0
SW pin output voltage H
VSWH
1.3
Typ.
Max.
Unit
6.5
7.0
DC/DC converter
1.8
V
-
V
SW pin output voltage L
VSWL
0.5
1.0
V
SW pin oscillating
tSWSTA
75
100
125
KHz
frequency at start
SW pin oscillating
fSW1
46
58
70
KHz
frequency (self-running)
SW pin oscillating
frequency (CLK
fSW2
88.2
KHz
synchronization)
﹪
SW pin pulse duty at start DSWSTA 40
50
60
SW pin oscillating
﹪
80
90
95
maximum pulse duty
DSW1
(self-running)
SW pin oscillating
﹪
maximum pulse duty
DSW2
80
90
95
(CLK synchronization)
Triangular wave generation circuit
CT pin
VCTTHH 0.5
0.6
0.7
V
threshold voltage H
CT pin
VCTTHL 0.14
0.2
0.26
V
threshold voltage L
μA
CT pin sink current
ICTSIN
80
92
104
CT pin output
HCT
6.5
8
9.5
current ratio
Conditions
LG=5V
CT=0.2V, ISW=-5mA, EI=0.7,
VSPRT=0V
CT=2V, ISW=1mA
VSYS=1.6V, VG=5V
EI=0.7, CT=470PF, VSPRT=0V
EI=0.7, fCLK=88.2KHz,
VSPRT=0V
VSYS=1.6V, VG=5V
EI=0.7, CT=470PF, VSPRT=0V,
CLK=0V
EI=0.7, CT=470PF, VSPRT=0V
CT=0.5V→0.8V sweep
CT=0.3V→0V sweep
CT=1.0V
Sink current/source current
VSYS circuit section
Discharge release voltage
Starter→normal
switching voltage
Normal→starter
switching voltage
Starter→normal switching
hysteresis voltage
VDIS
1.40
1.51
1.62
V
VSTN
1.65
1.75
1.85
V
VSYS=1.5V→2V sweep
VNST
1.57
1.67
1.77
V
VSYS=2V→1.5V sweep
VSTNHIS
40
80
120
mV
VSTN-VNST
Reset section
EI pin reset voltage
threshold ratio
Reset pin output voltage
Reset pin leak current
HRST
VORESE
T
ILKRESE
T
80
85
90
﹪
Ratio of EI pin threshold ratio
-
-
0.5
V
IRESET=-1mA
-
-
2
μA VRESET=2.5V
Regulator circuit section
Regulator output voltage
VREG
REGB pin output voltage VOREGB
2.9
-
3.2
-
3.5
1.4
REGB pin leak current
ILKREGB
-
-
3
REGB pin limit current
ILMREGB
10
15
20
V
V
REGO=OPEN, DC_IN=6V
DC_IN=6V, IREG=10mA
REGO=3.5V, DC_IN=6V,
μA
REGB=6V
mA DC_IN=6V
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
6
AT5802
Preliminary
4-Channel driver + Power Controller
Parameter
Symbol Min.
DC_IN low-voltage
VDC-INL
mute ON voltage
V
DC_IN low-voltage
VDC-INO
mute OFF voltage
F
﹡This
Typ.
Max.
Unit
-
-
1.3
V
1.9
-
-
V
Conditions
product is not designed for protection against radioactive rays.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
7
AT5802
Preliminary
4-Channel driver + Power Controller
Application circuit
10u
DC
JACK
ZENER
SLED
SPINDLE
M
M
33
32
31
30
29
TRACKING
FOCUS
0.1u
0.1u
28
27
26
25
24
23
34
22
35
21
36
20
37
19
38
18
0.022u
1u
0.022u
0.1u
0.022u
470P
0.022u
AT5802
39
220
B1013
40
16
41
15
42
14
100uH
13
44
12
10u
1
2
3
4
5
59T
0.1u
8T
C4115SR
1K
22K
C4115SR
0.1u
8
9
10
IN4
20K
IN3
10K
IN2
10K
IN1
RESET
MUTE1
11
10uH
10
47P
7
CLK
1000P
6
START SW
100
33K
MUTE34
0.1u
43
OFF SW
100u
Vref
17
220u
24K
220u
10K
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
8
AT5802
Preliminary
4-Channel driver + Power Controller
Application explanation
1. DC/DC converter
To set the output voltage, use the following R1 and R2.
VSYS = 0.9 ×
R1 + R 2
R2
2. Booster circuit for driving the Power-Mos
This circuit can generate a power source VG necessary for driving the built-in Power-Mos
transistor. Oscillation frequency of LG terminal is independent and different from that of the main
DC/DC converter.
When system start-up, this circuit activates at first.
3. Down voltage regulator circuit
The DC_IN is the power source of regulator circuit. If PNP transistor is externally attached, it
allows the regulator circuit with the REGO set as the output voltage. Output voltage is 3.2V, this
regulator output voltage depends on the built-in resistance. This circuit unable to control ON/OFF.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
9
AT5802
Preliminary
4-Channel driver + Power Controller
4.Soft start
The soft-start is functioned by putting a capacitor between SOFT terminal and GND.
5. Short circuit protection
If the voltage of SPRT terminal has reached 0.5V, switching of SW terminal is disabled. The main
DC/DC converter can be turned off only through the activation of timer latch circuit. Accordingly be
sure to attach the capacitor on the SPRT terminal.
⊙ While the error amp output of EO is being completely set at “H”, SPRT terminal can be charged.
The time until stopping the switching is determined by the following formula for the capacitor
of SPRT terminal.
t = CSPRT ×
VTH
I SPRT
(sec)
(VTH=0.5V, ISPRT=5.8μA)
⊙ While the OFF terminal is being set at below VSYS-1.5V, SPRT terminal can be charged. The
time until stopping the switching is determined by the following formula for the capacitor of
SPRT terminal.
t = CSPRT ×
VTH
I SPRT
(sec)
(VTH=0.5V, ISPRT=11.5μA)
6. PWM driver
H-bridge driver using 4 pieces of N-channel Mos transistor on output stage. Polarity of output and
PWM duty are changed in proportion to differential voltage and absolute value of input sandwiching
Vref. Load is direct-PWM driven by square wave of this changing duty. This driver is voltage
feedback type, so, voltage gain is invariable in spite of fluctuation of battery voltage.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
10
AT5802
Preliminary
4-Channel driver + Power Controller
7. Thermal shut down
When the chip temperature has been 150℃ (Typ.), the output current is muted. And when the
chip temperature has dropped to 130℃ (Typ.), the driver circuit starts up.
Note in use
1. Between power supplies, attach a by-pass capacitor (approx. 0.1μF) at the root of this IC.
2. In principle, do not apply voltage below sub-potential of IC to terminal. Examine in consideration of
operation margin, when each driver output falls below sub-voltage of IC (GND) due to counterelectromotive-force of choke coil, etc.
3. Output pin is to avoid short-circuiting with PVCC, GND, and other output pins. And, be fully careful
in the direction of an integrated circuit on the substrate.
4. When use AC adapter, if apply beyond 7V to DC_IN pin, connect Z-Di with DC_IN pin. So keep
voltage of DC_IN being below 7V. To protect IC, once the voltage to be applied on the DC_IN
terminal exceeded 7.5V (Typ.), SPRT terminal can be charged.( ISPRT=11.5μA, see short circuit
protection)
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
11
AT5802
Preliminary
4-Channel driver + Power Controller
Package Outlines (units:mm): QFP-44
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
12
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