Nokia Mobile Phones NSE-5 Series, Service Manual, Page: 25 / 327

PAMS
Technical Documentation
NSE–5
System Module
Page 2 – 11
Issue 1 07/99
Table 3. System/IBI connector (continued)
Description Unit Max Typ Min Function Name IB-
pin
Pin
2,
14
– L_GN
D
Logic and
charging
ground
(sepa-
rated from
phone
GND by
EMI com-
ponents) 0 1.0 A Ground current
4,5 – CHRG
_CTR
L
Charger
control
(f 0 0.8 V Output low voltage @ I
OL
20
m
A
_C
L
c
(from
phone to
accessory
1.7 2.9 V Output high voltage @ I
OH
20
m
A
accessory
32 37 Hz PWM frequency
1 99 % PWM duty cycle
20 k
W
Serial (EMI filtering) resistor
in phone
30 k
W
Pull–down resistor in phone
1,3 – VIN Fast
h
0 8.5 V Charging voltage. ,
charger
(from ac-
0 0.85 A Charging current.
(from ac-
cessory to
phone)
100 mV-
p–p
Ripple voltage @ f =
20...200Hz, load = 3 & 10
W
hone)
100 mV-
p–p
Ripple voltage @ f = 0.2...30
kHz, load = 3 & 10
W
100 mV-
p–p
Ripple voltage @ f > 30 kHz,
load = 3 & 10
W
200 mV-
p–p
Total ripple voltage @ f > 20
Hz, load = 3 & 10
W
Slow
charger
(fom ac-
0 15 V
pea
k
Charging voltage (max. = un-
loaded, +20 % overvoltage in
mains).
(
cessory to
phone)
0 1.0 A
pea
k
Charging current (max. =
shorted, +20 % overvoltage
in mains).