SI3232-KQ Silicon Laboratories Inc, SI3232-KQ Datasheet - Page 28

• Manufacturer Part Number: SI3232-KQ
• Description: IC SLIC PROG DUAL-CH 64TQFP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3232-KQ

• Package / Case: *
• Function: Subscriber Line Interface Concept (SLIC)
• Interface: ISDN
• Number Of Circuits: 2
• Voltage - Supply: 3.13 V ~ 3.47 V
• Current - Supply: 28mA
• Power (watts): 280mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Product: SLIC
• Supply Voltage (min): 3.13 V
• Supply Current: 28 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Si3232
Automatic State Change Based on Power Alarm
If any of the following situations occurs, the device
automatically transitions to the OPEN state:
!
!
To provide optimal reliability, the device automatically
transitions into the open state until the user changes the
state manually, independent of whether or not the power
alarm interrupt has been masked. The PQ1E to PQ6E
bits of the IRQEN3 register are used to enable the
interrupts for each transistor power alarm, and the
PQ1S to PQ6S bits of the IRQVEC3 register are set
when a power alarm is triggered in the respective
transistor. When using the Si3200, the PQ1E bit is used
to enable the power alarm interrupt, and the PQ1S bit is
set when a Si3200 power alarm is triggered.
Automatic Dual Battery Switching
The Si3232 and Si3200 provide the ability to switch
between several user-provided battery supplies to aid
thermal management. This method is required during
the ringing to off-hook and on-hook to off-hook state
transitions.
28
Si3200 Power Output Monitor
Si3200 Power Alarm Interrupt Pending
Si3200 Power Alarm Interrupt Enable
Q1/Q2 Power Alarm Threshold (discrete)
Q1/Q2 Power Alarm Threshold (Si3200)
Q3/Q4 Power Alarm Threshold
Q5/Q6 Power Alarm Threshold
Q1/Q2 Thermal LPF Pole
Q3/Q4 Thermal LPF Pole
Q5/Q6 Thermal LPF Pole
Q1–Q6 Power Alarm Interrupt Pending
Q71–Q6 Power Alarm Interrupt Enable
Table 16. Register and RAM Locations used for Power Monitoring and Power Fault Detection
Any of the transistor power alarm thresholds is
exceeded (in the case of the discrete transistor
circuit).
The total power threshold is exceeded (when using
the power calculator method along with the Si3200).
Parameter
Preliminary Rev. 0.95
IRQVEC3
IRQVEC3
Location
IRQEN3
IRQEN3
PLPF12
PLPF34
PLPF56
PTH12
PTH34
PTH56
PSUM
Power Dissipation Considerations
The Si3232 relies on the Si3200 to power the line from
the battery supply. The PCB layout and enclosure
conditions should be designed to allow sufficient
thermal
programmable power alarm threshold ensures product
safety under all operating conditions. See “Power
Monitoring and Power Fault Detection” for more details
on power alarm considerations. The Si3200’s thermally-
enhanced SOIC-16 package offers an exposed pad that
improves thermal dissipation out of the package when
soldered to a topside PCB pad connected to inner
power planes. Using appropriate layout practices, the
Si3200 can provide thermal performance of 55 °C/W.
The exposed path should be connected to a low-
impedance ground plane via a topside PCB pad directly
under the part. See package outlines for PCB pad
dimensions. In addition, an opposite-side PCB pad with
multiple vias connecting it to the topside pad directly
under the exposed pad further improves the overall
thermal performance of the system. Refer to “AN55:
Dual ProSLIC™ User Guide” or the Si3232 evaluation
board data sheet for layout guidelines for optimal
thermal dissipation.
During the on-hook operating state, the Si3232 must
operate from the ringing battery supply in order to
quickly provide the desired ringing signal when
required. Once an off-hook condition has been
detected, the Si3232 must transition to the lower battery
supply (typically –24 V, in order to reduce power
dissipation during the active state). The low current
Register/RAM
PLPF12[15:3]
PLPF34[15:3]
PLPF56[15:3]
PTH34[15:0]
PTH12[15:0]
PTH56[15:0]
PSUM[15:0]
PQ1S
PQ1E
Bits
dissipation
Measurement
See “Power Filter and Alarms”
See “Power Filter and Alarms”
See “Power Filter and Alarms”
0 to 16.319 W
0 to 16.319 W
out
0 to 34.72 W
0 to 34.72 W
0 to 1.03 W
Range
TBD
TBD
N/A
N/A
of
the
Si3200,
Resolution
1059.6 µW
1059.6 µW
31.4 µW
498 µW
498 µW
N/A
N/A
N/A
N/A
and
a