![Nokia 9000i Скачать руководство пользователя страница 153](http://html.mh-extra.com/html/nokia/9000i/9000i_service-manual_22031153.webp)
After Sales
Technical Documentation
RAE/RAK–1N
PDA Hardware
Page 6 – 41
Original, 08/96
Table 25. Electrical characteristics (continued)
Notes/conditions
Units
Max-
mum
Typi-
cal
Mini-
mum
Parameter
VCC5
4.825
5.0
5.175
V
tolerance over temperature and
load range
120
225
mV
dropout voltage at I=50mA
30
mA
regulator I
max
=50mA
peak current 100mA
0.4
1.2
mA
ground pin current (supply current)
PWRGOOD
3.04
3.08
3.11
V
reset threshold at room temperature
140
240
560
ms
power–on reset pulse width
30
ppm/C
reset threshold temperature
coefficient
VBACK
2.5
3.0
3.2
V
7
µ
A
nominal load when used
130
mAh
capacity, charging not possible
Operating tem-
perature range
–25
+85
°
C
some circuits tolerate
wider temperature range
Functional Description
VSYS regulator
System voltage regulator is current–mode pulse width modulation (PWM)
dc–dc step–down converter. It has internal switch transistor and current
sense resistor for current–mode control. Oscillator makes the switch
transistor to turn on at fixed frequency. Switch transistor on time is
determined by load taken at output. Current mode feedback makes
transient response fast and provides cycle by cycle current limiting. This
means that outer loop determines threshold voltage for current sense
amplifier to reach to turn switch transistor off. Inner current feedback loop
makes response to load current changes fast.
Outer feedback loop takes output voltage information and compares it to
reference and drives the error towards zero in order to keep regulation.
This kind of control keeps good regulation at output in rapidly changing
load conditions. Tradeoff is high operation current in very light loads
because oscillator is running all the time.
VSYS regulator operates at discontinuous conduction mode (DCM) at light
loads. This means that current through inductor decreases to zero before
new switch transistor turn–on pulse comes and current through inductor
starts to increase. At heavy loads inductor current does not go to zero
and operation is in continuous conduction mode (CCM).
Содержание 9000i
Страница 7: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 1 Overview ...
Страница 67: ...After Sales Technical Documentation RAE RAK 1N Series Amendment 1 04 97 Chapter 3 Transceiver GE8 GE9 RF Block ...
Страница 93: ...After Sales Technical Documentation RAE RAK 1N Series Chapter 4 Transceiver GE8 GE9 UIF Module ...
Страница 106: ...After Sales Technical Documentation RAE RAK 1N UIF Page 4 14 Amendment 1 04 97 This page intentionally left blank ...
Страница 107: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 5 Transceiver GE8 GE9 SIM Flex Module ...
Страница 112: ...After Sales Technical Documentation RAE RAK 1N SIM Flex Page 5 6 Original 08 96 This page intentionally left blank ...
Страница 113: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 6 PDA Hardware Module GP1 ...
Страница 116: ...After Sales Technical Documentation RAE RAK 1N PDA Hardware Page 6 4 Original 08 96 This page intentionally left blank ...
Страница 158: ...After Sales Technical Documentation RAE RAK 1N PDA Hardware Page 6 46 Original 08 96 This page intentionally left blank ...
Страница 159: ...After Sales Technical Documentation RAE RAK 1N Series Amendment 1 04 97 Chapter 7 Service Software ...
Страница 243: ...After Sales Technical Documentation RAE RAK 1N Series Original 05 97 Chapter 8 Faultfinding Disassembly ...
Страница 287: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Chapter 9 Service Tools ...
Страница 301: ...After Sales Technical Documentation RAE 1N Series Original 04 97 Chapter 10 Schematics ...
Страница 303: ...RAE 1N Original 08 96 10 11 Page 1 Figure 1 Component Layout Bottom ...
Страница 304: ...RAE 1N Original 08 96 10 12 Page Figure 2 Component Layout Top ...
Страница 305: ...RAE 1N Original 08 96 10 13 Page Figure 3 Baseband Circuit Diagram PWRU ...
Страница 306: ...RAE 1N Original 08 96 10 14 Page Figure 4 Baseband Circuit Diagram MCM1 ...
Страница 307: ...RAE 1N Original 08 96 10 15 Page Figure 5 Baseband Circuit Diagram MCM2 ...
Страница 308: ...RAE 1N Original 08 96 10 16 Page Figure 6 RF TX Circuit Diagram ...
Страница 309: ...RAE 1N Original 08 96 10 17 Page Figure 7 RF RX Circuit Diagram ...
Страница 310: ...RAK 1N 10 20 Page Amendment 1 04 97 Figure 18 PCN Component Layout Bottom ...
Страница 311: ...RAK 1N 10 21 Page Amendment 1 04 97 Figure 19 PCN Component Layout Top ...
Страница 312: ...RAK 1N 10 22 Page Amendment 1 04 97 Figure 20 PCN RF TX ...
Страница 313: ...RAK 1N 10 23 Page Amendment 1 04 97 Figure 21 PCN RF RX ...
Страница 314: ...RAK 1N 10 24 Page Amendment 1 04 97 Figure 22 UIF Schematic PCN ...
Страница 315: ...RAK 1N 10 25 Page Amendment 1 04 97 Figure 23 UIF Component Layout PCN ...
Страница 316: ...RAE 1N Original 05 97 10 3 Page Figure 1 PDA Block Diagram Edit 82 for layout 13a ...
Страница 317: ...RAE 1N Original 05 97 10 4 Page Figure 2 PDA Power Unit PWRU Edit 108 for layout 13a ...
Страница 318: ...RAE 1N Original 05 97 10 5 Page Figure 3 PDA Serial Interface SIRU Edit 24 for layout 13a ...
Страница 319: ...RAE 1N Original 05 97 10 6 Page Figure 4 PDA MCU and Memory PROCU Edit 121 for layout 13a ...
Страница 320: ...RAE 1N Original 05 97 10 7 Page Figure 5 PDA EMIU Edit 21 for layout 13a ...
Страница 321: ...RAE 1N Original 05 97 10 8 Page Figure 6 Keyboard matrix Edit 24 for layout 13a ...
Страница 322: ...RAE 1N Original 05 97 10 9 Page Figure 7 PDA Memory Edit 28 for layout 13a ...
Страница 323: ...RAE 1N Original 05 97 10 10 Page Figure 8 PDA Component Layout 13a ...
Страница 324: ...RAE 1N Original 08 96 10 18 Page Figure 1 UIF Schematic ...
Страница 325: ...RAE 1N Original 08 96 10 19 Page Figure 2 Component Layout Uif ...
Страница 326: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 Accessories ...
Страница 340: ...After Sales Technical Documentation RAE RAK 1N Series Original 08 96 CARK60 Installation Guide ...
Страница 352: ...After Sales Technical Documentation Appendix 2 RAE RAK 1N Amendment 1 04 97 PARTS LISTS ...
Страница 399: ...After Sales Technical Documentation RAE RAK 1N Parts Lists Page 48 Amendment 1 04 97 Mechanical Assy Parts RAE 1N ...
Страница 401: ...After Sales Technical Documentation RAE RAK 1N Parts Lists Page 50 Amendment 1 04 97 This page intentionally left blank ...
Страница 402: ...After Sales Technical Documentation Appendix 1 RAE RAK 1N Original 08 96 QUICK GUIDE ...
Страница 434: ......