HC5549_14 Datasheet, PDF (12/13 Pages) Intersil Corporation – Low Power SLIC with Battery Switch

HC5549
Basic Application Circuit
RP1
RP2
CPS1
CPS2
CPS3
D1
VCC VBL VBH
CRX
TIP
VRX
PROTECTION
NETWORK
U1 _VRB
HC5549
RING
VTX
RB1
CTX
RB2
-48V
CRT
RRT
SW+
SW-
RTD
-IN
VFB
RS
CFB
RSH
RD
SWC
BSEL
E0
RIL
ILIM
F0
VCC
CDC
CPOL
CIL
CDC
POL
F1
F2
DET
ALM
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.
12
FN4539.3