3-24
Theory of Operation
: Controller
3.2.2
DC Distribution
SW_B+ supply comes from a pass FET (Q6501) that is powered by (battery voltage).
The FET is activated once the power switch is in its on position. SW_B+ supplies the power for the
entire controller. SW_B+ supplies MAKO and the external regulators. MAKO and the external
regulators then regulate the voltage to the desired level. (
See Figure 3-15.
)
OMAP's core is supplied by VCC_SW_1.4 (U6507). 1.85 LDO supplies OMAP's IO, FLASH, CPLD,
DDR, and MACE. See
Table 3-2
for DC supplies and sources.
Figure 3-15. Controller DC Block Diagram
LDO2
LDO3
SW2
LDO4
LDO6
LDO7
LDO9
LDO10
SW5
VBUS1
VBUS2
External SW
TPS62050
MAKO
SW_B+
SW_B+
SW_B+
V_SW_3.6
SW1_3.6V
SW5_5.4V
1.55V
1.875V
V_EXT_1.85
2.23V
2.775V
2.775V
2.775V
3.0V
3.3V
LDO8
SW_B+
5.0V
5.0V
5.0V
EXSW_1.4V
800mA Max
400mA Max
120mA Max
150mA Max
100mA Max
50mA Max
100mA Max
50mA Max
70mA Max
1.5A Max
500mA Max
500mA Max
25mA Max
800mA Max
Ext SW
TPS62050
Ext LDO
TPS73601
Ext LDO
LP38693
SW1
3.6V
External SW
TPS62110
External Switcher Replaced
Switcher MAKO’s Switchr 5
Summary of Contents for APX 2000
Page 1: ...APXTM TWO WAY RADIOS APX 1000 APX 2000 APX 4000 APX 4000Li DETAILED SERVICE MANUAL ...
Page 4: ......
Page 6: ...iv Document History Notes ...
Page 8: ...Notes vi Commercial Warranty ...
Page 10: ...Notes ...
Page 22: ...xiv List of Figures Notes ...
Page 226: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 688: ...Index 4 Index Notes ...
Page 690: ...ii Notes ...
Page 700: ...xvi List of Figures Notes ...
Page 806: ...5 50 Troubleshooting Charts PA Failure Notes ...
Page 1008: ...8 178 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 84012621001 Notes ...
Page 1062: ...8 234 Schematics Boards Overlays and Parts Lists Keypad Board M2 and M3 PC000261A01 Notes ...
Page 1064: ...ii Notes ...
Page 1068: ...Notes A 4 EMEA Warranty Service and Technical Support Further Assistance From Motorola ...
Page 1090: ...Glossary 10 Glossary Notes ...
Page 1094: ...Index 4 Index Notes ...
Page 1095: ......