stlc3075 STMicroelectronics, stlc3075 Datasheet - Page 15

• Manufacturer Part Number: stlc3075
• Description: Integrated Pots Interface For Home Access Gateway And Wll
• Manufacturer: STMicroelectronics

STLC3075
Table 6.
1. CV
2. For low ripple application use 2x47m F in parallel.
3. Can be saved if proper PCB layout avoid noise coupling on RD pin (high impedance input).
4. RF1 sets the self generated battery voltage in RING and ACTIVE(Il=0) mode as shown in
5. For high efficiency in HI-Z mode coil resistance @125kHz must be < 3
CV
CV
CVB
CRD
Q1
D1
R
RF1
RF2
L
SENSE
Name
VBATR should be defined considering the ring peak level required (Vringpeak=VBATR-6V typ.). This relation is valid
providing that the V
requested by the particular ringer load configuration
POS
(3)
POS
should be defined depending on the power supply current capability and maximum allowable ripple
Positive supply filter capacitor
with low impedance for switch
mode power supply
Battery supply filter capacitor
with low impedance for switch
mode power supply
High frequency noise filter
High frequency noise filter
DC/DC converter switch P ch.
MOS transistor
DC/DC converter series diode V
DC/DC converter peak current
limiting
Negative battery programming
level
Negative battery programming
level
DC/DC converter inductor
External components for buckboost configuration (continued)
Table 7.
VBAT (ACTIVE)
VBATR (RING)
POS
Function
power supply current capability and the R
VBAT values in RING and ACTIVE modes
267k
-46V
-62V
RDS(ON) 1.2 , VDS = -100V
Total gate charge= 20nC max.
with VGS=4.5V and VDS=1V
ID>500mA
R
250K < RF1 < 300K
DC resistance 0.1
r
SENSE
> 100V, t
= 100mV/I
RR
Formula
50ns
SENSE
280k
PK
-48V
-65V
(5)
(4)
programming allow to source all the current
SUMIDA CDRH125 or equivalent
294k
-49V
-68V
Table 7
300k 1% @ V
110m @ I
IRF9510 or IRF9520 or
IRF9120 or equivalent
100 F 20% 100V
Functional description
470nF 20% 100V
Possible choices:
100nF 10% 15V
SMBYW01-200
.
or equivalent
Typ. value
9.1k 1%
L=100 H
100 F
PK
BATR
(1)
= 900mA
300k
-50V
-70V
= -70V
(2)
15/36