|Category||Analog & Mixed-Signal Processing|
|Company||Texas Instruments, Inc.|
|Datasheet||Download UCC3752 datasheet
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.D1 RSENSE LIN T1 VIN LR CR2 SAMPLING CIRCUIT CBYP1 AC SIGNAL CF VOUT CDC DC SIGNAL V1
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 +125°C Storage Temperature. to +150°C
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 70°C for the UCC3752 and to +85°C 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 70°C for the UCC3752 and to +85°C 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.
|Some Part number from the same manufacture Texas Instruments, Inc.|
|UCC3752D 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|
74FR25900 : 9-Bit 3-Port Latchable Datapath Multiplexer With 25 Ohm Output Series Resistors.
77V500 : SwitchStar. 1.24Gbps Switch Controller. SwitchStarTM ATM Cell Based 1.2Gbps non-blocking Integrated Switch Controller Single chip controller for IDT77V400 Switching Memory One IDT77V500 and one IDT77V400 form the core required for x 8 port non-blocking switch x Supports to 8192 Virtual Connections (VCs) x Per VC queuing for fairness, with four priorities per VC available for each output port.
HI-507A : Multiplexers. 16-Channel, 8-Channel, Differential 8-Channel And Differential 4-Channel, CMOS Analog Muxs With Active Overvoltage Protection.
LH2111 : Dual Voltage Comparator (discontinued). The LH2111 series of dual voltage comparators are two LM111 type comparators in a single hermetic package. Featuring all the same performance characteristics of the single, these duals offer in addition closer thermal tracking, lower weight, reduced insertion cost and smaller size than two singles. For additional information see the LM111 data sheet.
LM293 : Low Power Low Offset Voltage Dual Comparator. The LM193 series consists of two independent precision voltage comparators with an offset voltage as low 2.0 mV max for two comparators which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude.
LM3301N : Lm2900/lm3900/lm3301 Quad Amplifiers. The LM2900 series consists of four independent dual input internally compensated amplifiers which were designed specifically to operate off of a single power supply voltage and to provide a large output voltage swing These amplifiers make use of a current mirror to achieve the non-inverting input function Application areas include ac amplifiers RC active.
LM725 : LM725 - Operational Amplifier, Package: TO-5, Pin Nb=8. The LM725/LM725A/LM725C are operational amplifiers featuring superior performance in applications where low noise, low drift, and accurate closed-loop gain are required. With high common mode rejection and offset null capability, it is especially suited for low level instrumentation applications over a wide supply voltage range. The LM725A has tightened.
MAX4108 : 400MHz, Ultra-low-distortion op Amps. o High Speed: 400MHz Unity-Gain Bandwidth 225MHz -3dB Bandwidth (AVCL 220MHz -3dB Bandwidth (AVCL 200MHz -3dB Bandwidth (AVCL o 1200V/µs Slew Rate o Excellent Spurious-Free Dynamic Range: 100MHz 0.1dB Gain Flatness (MAX4108) o High Full-Power Bandwidth: 2Vp-p) o High Output Drive: 90mA o Output Short-Circuit Protected o Low Differential Gain/Phase:.
MAX6305 : Power. 5-Pin, Multiple Input, Programmable Reset Ics. The MAX6305MAX6313 CMOS microprocessor (µP) supervisory circuits are designed to monitor more than one power supply. Ideal for monitoring both 5V and 3.3V in personal computer systems, these devices assert a system reset if any of the monitored supplies falls outside the programmed threshold. Low supply current (15µA) and a small package suit them.
MAX900 : High-Speed, Low-power Voltage Comparators. The MAX900MAX903 high-speed, low-power, single/ dual/quad voltage comparators feature differential analog inputs and TTL-logic outputs with active internal pullups. Fast propagation delay (8ns typ at 5mV overdrive) makes the MAX900MAX903 ideal for fast A/D converters and sampling circuits, line receivers, V/F converters, and many other data-discrimination.
NJM14558 : Dual Operational Amplifier. The NJM14558 is dual operational amplifier, which can operate from ±2V supply. The are low offset voltage, low bias current and low current consumption. The package lineup is DIP, DMP and others compact, which is SON (Small Package on Leadless), so that the NJM14558 is suitable for portable audio and any kind of signal amplifier. Operating Voltage Input.
NJM5534 : High Performance Low-noise Operational Amplifier.
OP275 : Dual Bipolar/JFET, Audio Operational Amplifier. Excellent Sonic Characteristics Low Noise: 6 nV/Hz Low Distortion: 0.0006% High Slew Rate: V/ s Wide Bandwidth: 9 MHz Low Supply Current: 5 mA Low Offset Voltage: 1 mV Low Offset Current: 2 nA Unity Gain Stable SOIC-8 Package APPLICATIONS High Performance Audio Active Filters Fast Amplifiers Integrators GENERAL The OP275 is the first amplifier to feature.
OPA2674I-14D : Line Drivers and Receivers. ti OPA2674, Dual Wideband, High Output Current, Operational Amplifer With Current Limit.
OPA548F : Power Operational Amplifiers. ti OPA548, High-Voltage, High-current op Amp, Excellent Output Swing.
PA84 : High Voltage Power Operational Amplifier. HIGH SLEW RATE 200V/µs FAST SETTLING TIME 1µs (PA84S) FULLY PROTECTED INPUT to ±150v LOW BIAS CURRENT, LOW NOISE FET Input WIDE SUPPLY RANGE to ±150V APPLICATIONS HIGH VOLTAGE INSTRUMENTATION ELECTROSTATIC TRANSDUCERS & DEFLECTION PROGRAMMABLE POWER SUPPLIES TO 290V ANALOG SIMULATORS The is a high voltage operational amplifier designed for output voltage.
PACAC97T : PC Audio Resistor Network.
TPA731 : 700-mw Mono Low-voltage Audio Power Amplifier With Differential Inputs.
TSH80 : Wide Band, Rail to Rail Operational Amplifier With Standby Functionthe TSH8x Serie Offers Single And Dual Operationalamplifiers Featuring High Video Performanceswith Large Bandwidth, Low Distortion And Excellentsupply Voltage Rejection. These Amplifiers Featurealso Large Output Voltage Swing And High Outputcurrent Capability to Drive Standard 150Wloads.Running.
NJU7056 : Rail-to-Rail Output Single CMOS Operational Amplifier The NJU7056 is a single CMOS operational amplifier that feature low noise as VNI=15nV/âˆšHz (at VDD= 5V, f=1kHz). It is tolerant to RF noise.The NJU7056 can operate from a single-supply voltage of +1.8Vto +5.5V. In addition, this amplifier Rail-to-Rail output and low input bias current (1pA)..