HC-5509B3999-003 Datasheet, PDF (9/10 Pages) Intersil Corporation – SLIC Subscriber Line Interface Circuit

HC-5509B3999-003
Applications Diagram
R_S1 C_S1
+5V
K₂
+5V
K₁
TIP
K_1A
R_B1
R_B2
SECONDARY
PROTECTION
(NOTE 3)
C₅
VB-
PRIMARY
PROTECTION
K_IB
R_S2
C_S2
RING
R_B3
PTC
Z₁
V_RING R_B4
150V_PEAK (MAX)
SYSTEM CONTROLLER
SHD GKD PRI RS TEST F1 ALARM F0
RD
PR
I_LIMIT
TIP
VRX+
VFB
SLIC
HC-5509B3999-003
VTX
-IN1
RFS
OUT1
RING
VB- BG C₂ DG AG VB+ C₁
C₃
C₄
+5V
R_L1
C_AC
K_RF
K_Z0
R_L2
FROM PCM
FILTER/CODER
TO HYBRID
BALANCE
NETWORK
FIGURE 1. TYPICAL LINE CIRCUIT APPLICATION WITH THE MONOLITHIC SLIC
TYPICAL COMPONENT VALUES
C₁ = 0.5µF, 30V
C₂ = 0.5µF-1.0µF ±10%, 20V (Should be nonpolarized)
C₃ = 0.01µF, 100V, ±20%
C₄ = 0.01µF, 100V, ±20%
C₅ = 0.01µF, 100V, ±20%
C_AC = 0.5µF, 20V
KZ₀ = 60kΩ, (Z₀ = 600Ω, K = Scaling Factor = 100)
R_L1, R_L2; Current Limit Setting Resistors:
R_L1 + R_L2 > 90kΩ → offset
I_LIMIT = (0.6) (R_L1 + R_L2)/(200 x R_L2), R_L1 typically 100kΩ
K_RF = 20kΩ, RF = 2(R_B2 + R_B4), K = Scaling Factor = 100)
R_B1 = R_B2 = R_B3 = R_B4 = 50Ω (1% absolute, matching
requirements covered in a Tech Brief)
R_S1 = R_S2 = 1kΩ typically
C_S1 = C_S2 = 0.1µF, 200V typically, depending on V_Ring and
line length.
Z₁ = 150V to 200V transient protector. PTC used as ring
generator ballast.
NOTES:
1. All grounds (AG, BG, & DG) must be applied before V_B+ or V_B-. Failure to do so may result in premature failure of the part. If a user wishes to
run separate grounds off a line card, the AG must be applied first.
2. Application shows Ring Injected Ringing, a Balanced or Tip injected configuration may be used.
3. Secondary protection diode bridge recommended is 3A, 200V type.
Additional information is contained in Application Note 549, “The HC-550X Telephone SLICs” By Geoff Phillips
9