MITSUMI
4ch Moter driver IC for Portable CD Player
3 DC-DC converter block
(1) Output voltage
· 3.2V typ. voltage multiplier circuit can be constructed using external components. This voltage can be
varied with the addition of an external resistor. The setting method is as follows.
R1 · R3
+
R2 · R4
VSYS1=1.2
R1+R3 R2+R4
(V)
R2 · R4
R2+R4
(2) Short protect function
· When the error amplifier output(6PIN)has switched to the high-level state,SPRT(8PIN)is charged, and when
the voltage reaches 1.2V typ. , the SW(5PIN)switching stops.The time until switching stops is set by the
capacitor connected to SPRT(8PIN)according to the following formula.
t=CSPRT
V
TH
(sec) (V
TH
=1.2V, ISPRT=10µA)
ISPRT
(3) Soft start function
· The soft start function operates when a capacitor is connected between DEAD(4PIN)and GND.
Also, the maximum duty can be varied by connecting a resistor to 4PIN.
t=CDEAD R (sec) (R=65k
Ω
)
(4) Power off function
· When low-level is applied to OFF(40PIN), SPRT(8PIN)is charged, and when the voltage reaches 1.2V typ. ,
the SW(5PIN)switching stops. The time until switching stops is set by the capacitor connected to
SPRT(8PIN)according to the following formula.
t=CSPRT
V
TH
(sec) (V
TH
=1.2V, I
OFF
=20µA)
I
OFF
R3
R4
12
7
EI
R1
R2
1.2V
R1=external resistor
R2=external resistor
R3=35k
Ω
R4=21k
Ω
VSYS1
51
Summary of Contents for PV420S
Page 1: ...SERVICE MANUAL PV420S WWW BBK RU ...
Page 72: ... 69 CXD3068Q Block Diagram ...
Page 73: ... 70 CXD3068Q Pin Configuration ...
Page 122: ... 119 CXD3068Q Timing Chart 1 3 ...
Page 123: ... 120 CXD3068Q Timing Chart 1 4 ...
Page 124: ... 121 CXD3068Q Timing Chart 1 5 ...
Page 129: ... 126 CXD3068Q Timing Chart 2 1 ...
Page 130: ... 127 CXD3068Q Block Diagram 2 2 ...
Page 131: ... 128 CXD3068Q Timing Chart 2 3 ...
Page 134: ... 131 CXD3068Q Timing Chart 2 6 ...
Page 138: ... 135 CXD3068Q VCO C Mode Fig 3 3 Access Flow Chart Using VCO Control ...
Page 140: ... 137 CXD3068Q Block Diagram 4 1 ...
Page 143: ... 140 CXD3068Q Timing Chart 4 4 ...
Page 147: ... 144 CXD3068Q Fig 4 6 a Auto Focus Flow Chart Fig 4 6 b Auto Focus Timing Chart ...
Page 148: ... 145 CXD3068Q Fig 4 7 a 1 Track Jump Flow Chart Fig 4 7 b 1 Track Jump Timing Chart ...
Page 149: ... 146 CXD3068Q Fig 4 8 a 10 Track Jump Flow Chart Fig 4 8 b 10 Track Jump Timing Chart ...
Page 150: ... 147 CXD3068Q Fig 4 9 a 2N Track Jump Flow Chart Fig 4 9 b 2N Track Jump Timing Chart ...
Page 151: ... 148 CXD3068Q Fig 4 10 a Fine Search Flow Chart Fig 4 10 b Fine Search Timing Chart ...
Page 152: ... 149 CXD3068Q Fig 4 11 a M Track Move Flow Chart Fig 4 11 b M Track Move Timing Chart ...
Page 157: ... 154 CXD3068Q Fig 4 15 CD TEXT Data Timing Chart ...
Page 162: ... 159 CXD3068Q Fig 5 3a Fig 5 3b ...
Page 196: ... 193 CXD3068Q Description of Data Readout ...
Page 200: ... 197 CXD3068Q ...
Page 201: ... 198 CXD3068Q ...
Page 202: ... 199 CXD3068Q ...
Page 207: ... 204 CXD3068Q Package Outline Unit mm ...
Page 208: ...This data sheet has been made from recycled paper to help protect the environment 205 ...