This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only,

See Technical Specifications

UCC3750DW +BOM

Telecom Ringer Mult Gen Circuit 5V 20Hz/25Hz/50Hz 28-Pin SOIC Tube

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

UCC3750DW
Datasheet:

UCC3750DW Datasheet (PDF)
Topology:

Boost, Flyback
Control Mode:

Voltage
Duty Cycle (max) (%):

50
Operating Temperature Range (°C):

0 to 70
EDA/CAD Models:

Request Free CAD Models for UCC3750DW

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

UCC3750DW General Description

The UCC3750 Source Ringer Controller provides a complete control and drive solution for a four quadrant flyback-based ring generator circuit. The IC controls a primary side switch, which is modulated when power transfer is 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 power is being delivered back to the source.

The UCC3750 has an onboard sine wave reference with programmable frequencies of 20Hz, 25Hz and 50Hz. The reference is derived from a high-frequency (32kHz) crystal connected externally. Two frequency-select pins control an internal divider to give a sinusoidal output at 20Hz, 25Hz or 50Hz. The ring generator can also be used at other frequencies by sup-plying externally generated sine-waves to the chip or by clocking the crystal input at a fixed multiple of the desired frequency.

Other features included in the UCC3750 are programmable DC current limit (with buffer amplifier), a charge-pump circuit for gate drive voltage, internal 3V and 7.5V references, a triangular clock oscillator and a buffer amplifier for adding programmable DC offset to the output voltage. The UCC3750 also provides an uncommitted amplifier (AMP) for other signal processing requirements.

Key Features

Provides Control for Flyback Based Four Quadrant Amplifier Topology
Onboard Sine Wave Reference with Low THD
Selectable Ringing Frequency for Different Phone Systems (20Hz, 25Hz and 50Hz)
Programmable Output Amplitude and DC Offset
DC Current Limiting for Short Circuit Protection
Secondary Side Voltage Mode Control
Operates from a Single 5V Supply

Specifications

Topology	Boost, Flyback	Control mode	Voltage
Duty cycle (max) (%)	50	Operating temperature range (°C)	0 to 70
Rating	Catalog	feature-application	Generator Circuit
feature-line-operation	Multiple	feature-ringing-frequency-hz	20\|25\|50
feature-minimum-operating-supply-voltage-v	4.5	feature-maximum-operating-supply-voltage-v	5.5
feature-packaging	Tube	feature-pin-count	28
feature-cecc-qualified	No	feature-military	No
feature-aec-qualified	No	feature-eccn-code	EAR99
feature-svhc	No	feature-svhc-exceeds-threshold	No