Details, datasheet, quote on part number: UCC3752D
CategoryPower Management => Telecom Ringers Power Management
TitleTelecom Ringers Power Management
Descriptionti UCC3752, Resonant Ring Generator Controller
CompanyTexas Instruments, Inc.
DatasheetDownload UCC3752D datasheet
Find where to buy


Features, Applications

Novel Topology for Low-Cost, Efficient The UCC3752 controller is designed for driving a power stage that generGeneration of Ring Voltage ates low frequency, high voltage sinusoidal signals for telephone ringing applications. The controller and the power stage are most suitable for up to Suitable for Multi-Line Operation 5 line applications where low cost, high efficiency and minimum parts count Selectable 20, 25 and 50 Hz Ring are critical. A semi-regulated DC voltage is added as an offset to the ringFrequency ing signal. The ring generator operation is non-isolated and open loop. Secondary (AC) Current Limiting Generates an Off-Hook Detect Signal Primary Current Limiting to Turn Power Stage Off Under Fault Conditions Operates from a Single 12V Supply The UCC3752 directly drives primary side switches used to implement a push-pull resonant converter topology and transformer coupled sampling switches located on the secondary of the converter. For normal ring signal generation, the primary switching frequency and secondary sampling frequency are precisely offset from each other by the ringing frequency to produce a high voltage low frequency alias signal at the output. The off-hook condition is detected by sensing the AC current and when AC limit is exceeded, a flag is generated on the OFFHOOK pin. The drive signal frequencies are derived from a high frequency (3579545 Hz) crystal. The primary switching frequency is 89.489 kHz and the sampling frequency 50 Hz less depending on the status of frequency select pins FS0 and FS1.

The circuits described in this datasheet are covered under US Patent #5,663,878 and other patents pending.


Input Supply Voltage. 13.2V Analog Inputs (OHD, DCLIM, XTAL1, XTAL2) Maximum Forced Voltage. to 5V Logic Inputs Maximum Forced Voltage. to 7.5V Reference Output Current (VDD). Internally Limited Output Current (DRV1, DRV2, DRVS) Pulsed. 1.5A Operating Junction Temperature. to +125C Storage Temperature. to +150C

Note: Unless otherwise indicated, voltages are referenced to ground and currents are positive into, negative out of, the specific terminals. Pulsed is defined as a less than 10% duty cycle with a maximum duration 500 S.

ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications hold for to 70C for the UCC3752 and to +85C for the TA = TJ.

PARAMETER V12 Supply Current Section Supply Current ENABLE = 0V ENABLE = 5V Internal Reference with External Bypass Section Output Voltage (VDD) Load Regulation Line Regulation Short Circuit Current Output Drivers Section (DRV1, DRV2) Pull Up Resistance Pull Down Resistance Rise Time Fall Time Output Drivers Section (DRVS) Pull Up Resistance Pull Down Resistance Sample Pulse-Width Rise Time Fall Time ILOAD to 20mA ILOAD to 20mA Mode 1 (Table 1) CLOAD = 1nF CLOAD 1nF nS ILOAD to 20mA ILOAD to 20mA CLOAD = 1nF CLOAD nS 0mA IVDD < 13V, IVDD = 1mA VDD mV mA TEST CONDITIONS MIN TYP MAX UNITS

UCC2752 UCC3752 ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications hold for to 70C for the UCC3752 and to +85C for the TA = TJ.

PARAMETER Current Limit Section DCLIM Threshold DCLIM Input Current OffHook Detect Section OHD Threshold OHD Input Current Offhook VOH Offhook VOL Offhook Pull-Up Impedance Offhook Pull-Down Impedance Frequency Section (Table 1) Primary Switching Frequency Sampling Switching Frequency All cases 3.579545 MHz Crystal = 0, Mode 1, (Table = 0, Mode = 1, Mode Hz VOHD = 0V IOFFHOOK = 1mA IOFFHOOK = 1mA ILOAD to 1mA ILOAD nA V VDCLIM mV nA TEST CONDITIONS MIN TYP MAX UNITS

DCLIM: Primary current sense input. Signal proportional to the primary switch current. All outputs are turned off when a threshold 300mV is exceeded on this pin. This current-limit works on a cycle-by-cycle basis. DRV1, DRV2: Low impedance driver outputs for the primary switches. DRV1 and DRV2 are complimentary and have 50% duty cycle. DRVS: Low impedance driver output for the sampling switch(es). The pulse width of this output is 280ns. Typically, a pulse transformer is used to couple the short sampling pulses at DRVS to the floating sampling switch(es). ENABLE: Logic input which turns off the outputs when low. FS0, FS1: Frequency select pins for determining the difference frequency between primary and secondary pulses under normal operation. These pins can be hardwired to GND or VDD to get one of the available output frequencies (20,25 and 50 Hz). See Table 1 in the spec table. GND: Reference point for all the internal voltages and common return for the device. OFFHOOK: Output indicating the off-hook condition. This signal can be used by an external circuit to switch to a line from the ring generator output to the DC voltage. OHD: Off-Hook Detect. Voltage proportional to output current DC level is fed into this pin and compared to an internal threshold 300mV. If the threshold is exceeded, the OFFHOOK output goes high. PGND: Return point for the output drivers. Connect to GND at a single point in the circuit. VDD: Internal regulated 5V supply. This voltage is used to power all the internal precision circuits of the IC. This pin needs to be bypassed to GND with ceramic capacitor. VS12: External 12V power supply for the IC. Powers VDD and provides voltage for the output drivers. XTAL1, XTAL2: Pins for connecting precision Crystal to attain the accurate output frequencies. An external square-wave pulse can also be applied XTAL1 is tied to VDD/2.


Related products with the same datasheet
Some Part number from the same manufacture Texas Instruments, Inc.
UCC3752DTR ti UCC3752, Resonant Ring Generator Controller
UCC3776 Quad Fet Driver
UCC3776DP ti UCC3776, Quad Fet Driver
UCC3800 Low-power Bicmos Current-mode PWM
UCC3800D ti UCC3800, Low-power Bicmos Current-mode PWM
UCC3801 Low-power Bicmos Current-mode PWM
UCC3801D ti UCC3801, Low-power Bicmos Current-mode PWM
UCC3802 Low-power Bicmos Current-mode PWM
UCC3802D ti UCC3802, Low-power Bicmos Current-mode PWM
UCC3803 Low-power Bicmos Current-mode PWM
UCC3803D ti UCC3803, Low-power Bicmos Current-mode PWM
UCC3804 Low-power Bicmos Current-mode PWM
UCC3804D ti UCC3804, Low-power Bicmos Current-mode PWM
UCC3805 Low-power Bicmos Current-mode PWM
UCC38050 Transition Mode PFC Controller
UCC38050D ti UCC38050, Transition Mode PFC Controller
UCC38050DR Transition Mode PFC Controller
UCC38050DR ti UCC38050, Transition Mode PFC Controller
UCC38050P Transition Mode PFC Controller
UCC38050P ti UCC38050, Transition Mode PFC Controller
UCC38051 PFC Controller For Low to Medium Power Applications Requiring Compliance With Iec 1000-3-2

ADS823E : ti ADS823, 10-Bit, 60 MSPS ADC SE/Diff, Int/ext Ref., Program. I/p Range W/Pwrdown, Comp. To ADS822/4/5/6/8

SN74AUC1G06DCKR : Single Gates ti SN74AUC1G06, Single Inverter Buffer/driver With Open-drain Output

SN74CBTLV3245DBR : Standard Bus Switches ti SN74CBTLV3245, Low-voltage Octal Fet Bus Switch

SN74S169N : ti SN74S169, Synchronous 4-Bit Up/down Binary Counters

THS4021IDGNR : ti THS4021, 350-MHz Ultra-low Noise Voltage-feedback Amplifier

TLV2770IDGK : ti TLV2770, Single 2.7-V High-slew-rate Rail-to-rail Output Operational Amplifier W/shutdown

TPS3106E20DVB : Ultralow Supply-current/supply-voltage Supervisory Circuits

LM293DE4 : DUAL Differential Comparators

TPS657052YZHT : 3-Channel Power Management IC TPS657051/52 are small power management units targeted for embedded camera module or other portable low power consumer end equipments. It contains two high efficient step down converters, a low dropout linear regulator and additional supporting functions. The 2.25MHz s

ISO7242CQDWRQ1 : Digital Isolator Channel 16-SOIC (0.295", 7.50mm Width); ISOLATOR DGTL 25MBPS 4CH 16SOIC Specifications: Number of Channels: 4 ; Package / Case: 16-SOIC (0.295", 7.50mm Width) ; Propagation Delay: 56ns ; Data Rate: 25Mbps ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant

TPS65252RHDT : Pmic - Voltage Regulator - Dc Dc Switching Regulator Integrated Circuit (ics) Step-Down (Buck) Yes 0.8 V ~ 15 V; IC BUCK SYNC DL ADJ 3A 2A 28VQFN Specifications: Type: Step-Down (Buck) ; Output Type: Adjustable ; PWM Type: Current Mode ; Synchronous Rectifier: Yes ; Number of Outputs: 2 ; Voltage - Output: 0.8 V ~ 15 V ; Current - Output: 3A, 2A ; Frequency - Switching: 300kHz ~ 2.2MHz ; Voltage - Input: 4.5 V ~ 16 V ; Lead Free Status: Lead

Same catergory

ATW2812S : Hybrid DC-DC Converters. Hi-rel DC-DC Standard Single Converter in a Atw Package.

BQ2002GPN : ti BQ2002G, Nicd/nimh Gating Charge Management ic With Negative DV And Peak Voltage Detection Termination.

LCP3121 : ASD for Telecom Wireline. Overvoltage And Overcurrent Protection For Telecom Line - (ASD).

REG113-3 : . q CAP-FREE DMOS TOPOLOGY: Ultra Low Dropout Voltage: 250mV typ at 400mA Output Capacitor not Required for Stability TO 500mA PEAK, TYPICAL q FAST TRANSIENT RESPONSE q VERY LOW NOISE: 28Vrms q HIGH ACCURACY: 1.5% max q HIGH EFFICIENCY: IGND 850A at IOUT = 400mA Not Enabled: IGND 3.0V, 3.3V, AND 5.0V OUTPUT VERSIONS q OTHER OUTPUT VOLTAGES AVAILABLE.

SC1102 : Single-Phase Switching Regulators. Synchronous Voltage-mode Controller For Distributed Power-supply Applications.

TMC211 : Microstepping Stepper Motor Controller/driver With Lin Interface. Micro Stepping Stepper Motor Controller / Driver with LIN Interface The is a combined micro-stepping stepper motor motion controller and driver with RAM and OTP memory. The RAM or OTP memory is used to store motor parameters and configuration settings. The TMC211 allows up to four bit of microstepping and a coil current to 800 mA. After initialization.

TPS3306-33D : ti TPS3306-33, Dual-processor Supervisory Circuits With Power-fail. TPS3306-25, TPS3306-33 DUAL PROCESSOR SUPERVISORY CIRCUITS WITH POWER-FAIL Dual Supervisory Circuits With Power-Fail for DSP and Processor-Based Systems Voltage Monitor for Power-Fail or Low-Battery Warning Watchdog Timer With 0.8 Second Time-Out Power-On Reset Generator With Integrated 100 ms Delay Time Open-Drain Reset and Power-Fail Output Supply.

X5649 : Cpu Supervisor With Adjustable Low Voltage Reset, Active Low Reset. Low VCC detection and reset assertion --Five standard reset threshold voltages --Re-program low VCC reset threshold voltage using special programming sequence --Reset signal valid to VCC = 1V Long battery life with low power consumption --<50A max standby current, watchdog on --<1A max standby current, watchdog off --<400A max active current.

LM2735 : 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator The LM2735 is an easy-to-use, space-efficient 2.1A low-side switch regulator ideal for Boost and SEPIC DC-DC regulation. It provides all the active functions to provide local DC/DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency.

FPF1007 : FPF1007 - IntelliMAX Advanced Load Products The FPF1007/8/9 are low RDS P-Channel MOSFET load switches offered in a selection of 10s, 80s, and 1ms slew rate turn-on options for transient/in-rush current control. To support trends in mobile application requirements the minimum operating input voltage has been reduced down to 1.2V, the input current.

ISL6294A : High Input Voltage Charger The ISL6294A is a cost-effective, fully integrated high input voltage single-cell Li-ion battery charger. The charger uses a CC/CV charge profile required by Li-ion batteries. The charger accepts an input voltage up to 28V but is disabled when the input voltage exceeds the OVP threshold, typically 7.3V, to prevent excessive.

VN750SMP-E : High Side Switches Single-channel high-side driver with analog current sense for automotive applications.

TPS61040 : 28-V, 400-mA Switch Boost Converter In SOT-23 For LCD And White LED Applications The TPS61040/41 is a high-frequency boost converter dedicated for small to medium LCD bias supply and white LED backlight supplies. The device is ideal to generate output voltages up to 28 V from a dual cell NiMH/NiCd or a single cell Li-Ion battery. The part can also be used.

FSL116LR : Green Mode Fairchild Power Switch (FPS) The FSL116LR integrated Pulse Width Modulator (PWM) and SenseFET is specifically designed for highperformance offline Switch-Mode Power Supplies (SMPS) with minimal external components. FSL116LR includes integrated high-voltage power switching regulators that combine an avalanche-rugged SenseFET with a current-mode.

CM2830AGHIN92 : 300mA CMOS LDO The CM2830/CM2830A family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (30 ÂA typ.), low dropout voltage, and high output voltage accuracy. Built-in low on-resistance transistor provides low dropout voltage and large output current. A 2.2 ÂF or greater can be used as an output.

BQ294512DRVT : Overvoltage Protection Device For 2- To 3-Cell Li-Ion Batteries, With 4.40v OVP The bq2945xy family of products is a secondary level voltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition. Based on the configuration, an output is triggered after a fixed delay if any one of the two or three.

0-C     D-L     M-R     S-Z