UCC28230PWR ,Advanced PWM Controller for Bus Converters with 5V Precision Reference Voltage 14-TSSOP -55 to 125TYPICAL APPLICATION DIAGRAMS+VbiasUCC27200 UCC27200VbiasV VDDDDHB HBVinHI HO CT HO HI36 V to60VHS H ..
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UPA1703G-E2 ,Nch Power MOSFET 8bit SOP 30V/10Aapplications ofnotebook computers.85
UPA1704 ,SWITCHING N-CHANNEL POWER MOS FET INDUSTRIAL USEFEATURES• 2.5-V gate drive and low on-resistance6.0 ±0.314RDS(on)1 = 13 mΩ MAX. (VGS = 4.0 V, ID = ..
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UCC28230PW-UCC28230PWR
Advanced PWM Controller for Bus Converters with 5V Precision Reference Voltage
1FEATURES
DESCRIPTION
APPLICATIONS
UCC28230
UCC28231
www.ti.com................................................................................................................................................... SLUS814A–FEBRUARY 2008–REVISED JUNE 2008
Advanced PWM Controller for Bus Converters Programmable, Load Depended Off Time
Control The UCC28230, UCC28231 PWM bus controllers are
optimized for use in high efficiency, high power•
Frequency Controlled Start Up Allows Smalldensity, unregulated intermediate bus converters.
Output Inductor, Low Ripple and ConstantTopologies include push-pull, half-bridge and
Current Start with Large Output Capacitor full-bridge. External drivers, such as the UCC27200•
Two 0.2-A Push-Pull Outputs Provide Matched 120-V high-side/low-side drivers, can be used with
Control SignalsDto External Drivers this controller.•
Two Additional1-D Outputs for Optimal Use Low cost, small size and highly efficient solutions are
of Self-Drivenor Control Driven Synchronous providedby innovations such as:
Rectifiers • Start-up frequency control circuit allowing small•
Unregulated, Fixed Volt-Secondor Fixed output inductor and the abilityto start with large
Frequency Modes set by User intermediate bus capacitor.
Two, 1.5% Overall Accuracy Reference Voltage • Load depended off-time control setby user.
Options: 5-V for UCC28230 and 3.3-V for Additional 1-D control outputs can be used for
UCC28231 primary winding clamping in self-driven output•
Resistor Programmable Switching Frequency synchronous rectifier applicationsor as drive signals
to1 MHz for the control-driven synchronous rectifier.
Cycle-by-Cycle Current Limit Allows Parallel Cycle-by-cycle current limit prevents overstressesof
Operation with Droop Based Current Sharing converter.If the over current condition causes less
than 80% duty cycle at the output, then aftera•
Single External Capacitor sets Soft-Start andprogrammed time the controller proceeds into
Over Current Hiccup Mode Parameters with periodical shutdown and restart hiccup mode.
RestartThe UCC28230 provides5 V, and the UCC28231•
Severe Short Circuit Hiccup with Restartorprovides 3.3-V precision reference voltages with 1.5%
Latch Off Protection Option by External overall accuracy and 10-mA output current. This
Resistor reference voltage can be used to supply•
Input Under Voltage Lock Out housekeeping circuit and/or microcontroller. The•
Thermal Shutdown precision reference voltage can also be used for
accurate settingof system parameters.•
Thermally Enhanced3 mm×2 mm SON-12
and TSSOP-14 Package Options Other features include under-voltage lockout, thermal
shut down, programmable soft start, over-current
hiccup mode and short circuit protection with internal
restart by default that can be set into latch-off mode•
Intermediate Bus Isolated Convertersan external resistor.•
DC-to-DC Transformers
