HC5549 Datasheet, PDF (12/13 Pages) Intersil Corporation – Low Power SLIC with Battery Switch

HC5549
Basic Application Circuit
CPS1
CPS2
CPS3
D1
RP1
RP2
PROTECTION
NETWORK
-48V
CRT
RRT
RSH
RIL
VCC
CDC
CPOL
CIL
VCC VBL VBH
CRX
TIP
VRX
U1 _VRB
HC5549
RING
VTX
RB1
CTX
SW+
SW-
RS
-IN
CFB
RTD
VFB
RD
ILIM
CDC
POL
SWC
BSEL
E0
F0
F1
F2
DET
ALM
RB2
AGND
BGND
FIGURE 11. HC5549 BASIC APPLICATION CIRCUIT
Basic Application Circuit Component List
COMPONENT
VALUE TOLERANCE RATING
COMPONENT
VALUE TOLERANCE RATING
U1
HC5549
N/A
N/A
n/a
n/a
n/a
n/a
RRT
20kΩ
1%
0.1W
CDC
4.7µF
20%
10V
RSH
49.9kΩ
1%
0.1W
CPS1
0.1µF
20%
>100V
RIL
71.5kΩ
1%
0.1W
CPS2, CPS3
0.1µF
20%
100V
RS
210kΩ
1%
0.1W
D1
1N400X type with breakdown > 100V.
CRX, CRS, CTX, CRT, 0.47µF
CPOL, CFB
20%
10V
RP1, RP2
Protection resistor values are application
dependent and will be determined by protection
requirements. Standard applications will use ≥
35Ω per side.
Design Parameters: Ring Trip Threshold = 90 mA peak., Switch Hook Threshold = 12 mA, Loop Current Limit = 24.6 mA, Synthesize Device
Impedance = 210kΩ/400= 525Ω, with 39Ω protection resistors, impedance across Tip and Ring terminals = 603Ω.
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