Microchip Technology Microsemi miSLIC Le9642, Quick Reference User Manual

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ZLR964222L
Line Module User Guide
34
Microsemi Corporation Confidential and Proprietary
4. Device power is the power dissipated in the package. Total system power must also include power delivered to the line and
power efficiency of the battery supply. Total system power can be calculated (V
DD
* I
DD
) + (V
SW
* I
VSW
).
6.4.2 Default Profile Power Consumption
The following parameters are used to calculate DC feed and Ringing power consumption:
DC Feed Power Consumption
1. On- and off- hook

states: (see
Le9642
data sheet conditions)
2. Off-Hook Load 300

3. V
DD
= 3.3V, V
SW
= 12.0 V, V
BL
= 25 V, V
BH
= 60 V.
4. V
OC
= 48V, I
LA
= 23 mA
5. All tests were performed on a
ZLR964222L
Rev B0 module.
Ringing Power Consumption
Ringing tests have two conditions: C1 and C2 with ILR = 50 mA and RTTH = 21 mA (AC only).
1. C1 programmed ringing 25 Hz 70 V
PK
(50 V
RMS
), 0 V
DC
offset and 5 REN (1400

+ 40 µF) load
2. C2 programmed ringing 25 Hz 85 V
PK
(60 V
RMS
), 0 V
DC
offset and 3 REN (2333

+ 24 µF) load
Table 3 - Default Profile Power Dissipation
1. I
DD
supply current is the sum of I
AVDD
and I
DVDD
for the device.
2. Power numbers are per channel for both channels in the same state.
3. Power numbers are for a combinations of both channels for these specific conditions.
4. Device power is the power dissipated in the package. Total system power must also include power delivered to the line and
power efficiency of the battery supply. Total system power can be calculated (V
DD
* I
DD
) + (V
SW
* I
VSW
).
Operational State Condition
I
DD
mA
(1)
I
VSW
mA
I
VBL1/2
mA
I
VBH
mA
Device Power
mW
(4)
System
Power mW
(4)
Typ Typ Typ Typ Typ Typ
Shutdown
(2)
Disconnect, switcher off 1.5 0 0 0 5 5
Disconnect
(2)
Per Ch, Disconnect 4.9 0.69 0 0.1 22 25
Low Power Idle
(2)
Per Ch LPI 9 1.5 0 0.2 41.7 44.1
Idle/Standby
(2)
Per Ch Idle 15 5.9 0 0.78 96.3 120.3
Active OHT
(2)
Per Ch, OHT 20.2 14.8 0 2 186.7 244.3
Active (normal or
reverse polarity)
(3)
One Ch Off-Hook,
300

, other Ch LPI
31.4 76.2 23.7 0.73 580 1018
Both Ch Off-Hook,
300

39.2 146 47.5 1.03 1043 1881
Ringing
(3)
C1, Other Channel LPI 33.4 271 0 29.3 1375 3362
C2, Other Channel LPI 33.5 256 0 23.1 1290 3183
C1, Other Channel
Active
42.1 375 23.7 29.6 1955 4638
C2, Other Channel
Active
42 365 23.7 23.5 1870 4518