MITSUMI
4ch Moter driver IC for Portable CD Player
(5) Over voltage protection circuit
· When the voltage applied to BSEN(1PIN)reaches 8.4V typ. , SPRT(8PIN)is charged, and when the voltage
reaches 1.2V typ. , theSW(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
HV
=20µA)
IHV
4 Empty detector block
(1) Output voltage
· When the voltage applied to the BSEN(1PIN)falls below the detector voltage, EMP(35PIN)goes from high
level to low level(open-collector output). The detector voltage has 50mV typ. of hysteresis to prevent
output chattering. Use SEL(42PIN)to switch the detection voltage as shown below.
5 Reset circuit block
· At about 90% typ. of the DC-DC converter output voltage, RESET(3PIN)goes from low level to high level,
and AMUTE(34PIN)goes from high level to low level. The reset voltage has 50mV typ. of hysteresis to
prevent output chattering.
6 Charging circuit block
· The power supply for the charging circuit block is CHGV
CC
(41PIN), and is independent from the other
circuits.The resistance between RCHG(33PIN)and GND sets the charging current. This current is drawn
from SEL(42PIN).
· A thermal shutdown circuit is provided,and when the chip temperature reaches 150°C typ. the charging
current is cut. The chip starts operating again at about 120°C typ. .
SEL
Detect Voltage
Return Voltage
L
2.20V typ.
2.25V typ.
High-Z
1.80V typ.
1.85V typ.
52
Содержание PV420S
Страница 1: ...SERVICE MANUAL PV420S WWW BBK RU ...
Страница 72: ... 69 CXD3068Q Block Diagram ...
Страница 73: ... 70 CXD3068Q Pin Configuration ...
Страница 122: ... 119 CXD3068Q Timing Chart 1 3 ...
Страница 123: ... 120 CXD3068Q Timing Chart 1 4 ...
Страница 124: ... 121 CXD3068Q Timing Chart 1 5 ...
Страница 127: ... 124 CXD3068Q Timing Chart 1 16 CAV W mode EPWM 1 LPWR 0 Timing Chart 1 17 CAV W mode EPWM LPWR 1 ...
Страница 129: ... 126 CXD3068Q Timing Chart 2 1 ...
Страница 130: ... 127 CXD3068Q Block Diagram 2 2 ...
Страница 131: ... 128 CXD3068Q Timing Chart 2 3 ...
Страница 134: ... 131 CXD3068Q Timing Chart 2 6 ...
Страница 137: ... 134 CXD3068Q Fig 3 1 Disc Stop to Regular Playback in CLV W Mode CLV W Mode Fig 3 2 CLV W Mode Flow Chart ...
Страница 138: ... 135 CXD3068Q VCO C Mode Fig 3 3 Access Flow Chart Using VCO Control ...
Страница 140: ... 137 CXD3068Q Block Diagram 4 1 ...
Страница 143: ... 140 CXD3068Q Timing Chart 4 4 ...
Страница 147: ... 144 CXD3068Q Fig 4 6 a Auto Focus Flow Chart Fig 4 6 b Auto Focus Timing Chart ...
Страница 148: ... 145 CXD3068Q Fig 4 7 a 1 Track Jump Flow Chart Fig 4 7 b 1 Track Jump Timing Chart ...
Страница 149: ... 146 CXD3068Q Fig 4 8 a 10 Track Jump Flow Chart Fig 4 8 b 10 Track Jump Timing Chart ...
Страница 150: ... 147 CXD3068Q Fig 4 9 a 2N Track Jump Flow Chart Fig 4 9 b 2N Track Jump Timing Chart ...
Страница 151: ... 148 CXD3068Q Fig 4 10 a Fine Search Flow Chart Fig 4 10 b Fine Search Timing Chart ...
Страница 152: ... 149 CXD3068Q Fig 4 11 a M Track Move Flow Chart Fig 4 11 b M Track Move Timing Chart ...
Страница 157: ... 154 CXD3068Q Fig 4 15 CD TEXT Data Timing Chart ...
Страница 162: ... 159 CXD3068Q Fig 5 3a Fig 5 3b ...
Страница 176: ... 173 CXD3068Q Fig 5 26a Servo HighBooster Characteristics FCS TRK MCK 128Fs HBST1 0 HBST1 1 HBST0 0 HBST1 1 HBST0 1 ...
Страница 177: ... 174 CXD3068Q Fig 5 26b Servo LowBooster1 Characteristics FCS TRK MCK 128Fs LB1S1 0 LB1S1 1 LB1S0 0 LB1S1 1 LB1S0 1 ...
Страница 178: ... 175 CXD3068Q Fig 5 26c Servo LowBooster2 Characteristics FCS TRK MCK 128Fs LB2S1 0 LB2S1 1 LB2S0 0 LB2S1 1 LB2S0 1 ...
Страница 196: ... 193 CXD3068Q Description of Data Readout ...
Страница 200: ... 197 CXD3068Q ...
Страница 201: ... 198 CXD3068Q ...
Страница 202: ... 199 CXD3068Q ...
Страница 203: ... 200 CXD3068Q SLD Servo fs 345Hz Note Set the MSB bit of the K02 and K04 coefficients to 0 HPTZC Auto Gain fs 88 2kHz ...
Страница 207: ... 204 CXD3068Q Package Outline Unit mm ...
Страница 208: ...This data sheet has been made from recycled paper to help protect the environment 205 ...