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UCC3750DWN/a87avaiSource Ringer Controller
UCC3750DWTRTI N/a1avaiSource Ringer Controller


UCC3750DW ,Source Ringer ControllerMAXIMUM RATINGSInput Supply VoltageDIL-28, SOIC- 28 (Top View)VDD .... 7.5VN Package, DW PackageMax ..
UCC3750DWTR ,Source Ringer ControllerFEATURES DESCRIPTION• Provides Control for Flyback Based The UCC3750 Source Ringer Controller provi ..
UCC3751D ,Single Line Ring Generator Controller
UCC3751D ,Single Line Ring Generator Controller
ucc3800 ,Low-Power BiCMOS Current-Mode PWMMaximum Ratings.. 613 Device and Documentation Support........ 368.2 ESD Ratings........ 613.1 Rela ..
UCC3800D ,Low-Power BiCMOS Current-Mode PWMfeatures• Internal Leading-Edge Blanking of the Currentof internal full-cycle soft start and intern ..
UPA2716GR ,SWITCHING P-CHANNEL POWER MOSFETapplications of notebook 851, 2, 3 : Sourcecomputers and Li-ion battery protection circuit. 4 : Gat ..
UPA2716GR ,SWITCHING P-CHANNEL POWER MOSFETDATA SHEETMOS FIELD EFFECT TRANSISTOR µ PA2716GRSWITCHING P-CHANNEL POWER MOS FET DESCRIPTION PA ..
UPA2717GR ,SWITCHING P-CHANNEL POWER MOSFETDATA SHEETMOS FIELD EFFECT TRANSISTOR µ PA2717GRSWITCHING P-CHANNEL POWER MOS FET DESCRIPTION PA ..
UPA2718GR ,SWITCHING P-CHANNEL POWER MOSFETDATA SHEETMOS FIELD EFFECT TRANSISTORµ PA2718GRSWITCHING P-CHANNEL POWER MOS FET PACKAGE DRAWIN ..
UPA2730TP ,SWITCHING P-CHANNEL POWER MOSFETFEATURES6.0 ±0.3140.8 ±0.2 4.4 ±0.15• Low on-state resistance +0.175.2–0.2RDS(on)1 = 7.0 mΩ MAX. (V ..
UPA2730TP-E1 ,Pch enhancement-type MOS FETFEATURES6.0 ±0.3140.8 ±0.2 4.4 ±0.15• Low on-state resistance +0.175.2–0.2RDS(on)1 = 7.0 mΩ MAX. (V ..


UCC3750DW-UCC3750DWTR
Source Ringer Controller
UCC2750
UCC3750
DESCRIPTION

The UCC3750 Source Ringer Controller providesa complete control and
drive solution fora four quadrant flyback-based ring generator circuit. The controlsa primary side switch, whichis modulated when power transfer taking place from input to output.It also controls two secondary
switches which act as synchronous rectifier switches during positive
power flow. These switches are pulse-width-modulated when the poweris
being delivered backto the source.
The UCC3750 has an onboard sine wave reference with programmable
frequenciesof 20Hz, 25Hz and 50Hz. The referenceis derived froma
high-frequency (32kHz) crystal connected externally. Two fre-
quency-select pins controlan internal dividerto givea sinusoidal outputat
20Hz, 25Hzor 50Hz. The ring generator can also be usedat other fre-
quenciesby supplying externally generated sine-wavesto the chiporby
clocking the crystal inputata fixed multipleof the desired frequency.
Other features includedin the UCC3750 are programmable DC current
limit (with buffer amplifier),a charge-pump circuit for gate drive voltage,in-
ternal 3V and 7.5V references,a triangular clock oscillator anda buffer
amplifier for adding programmable DC offsetto the output voltage. The
UCC3750 also provides an uncommitted amplifier (AMP) for other signal
processing requirements.
Source Ringer Controller
TYPICAL APPLICATION
FEATURES
Provides Controlfor Flyback Based
Four Quadrant Amplifier Topology Onboard Sine Wave Reference with
Low THD Selectable Ringing Frequencyfor
Different Phone Systems (20Hz,
25Hz and 50Hz) Programmable Output Amplitude and Offset DC Current Limitingfor Short Circuit
Protection Secondary Side Voltage Mode
Control Operates froma Single 5V Supply
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