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UCD8220

Features: ` For Digitally Managed Power Supplies Using ` 25-ns Input-to-Output Propagation Delay Cs or the TMS320 ™ DSP Family ` 25-ns Current Sense-to-Output Propagation` Voltage or Peak Current Mode Control with Delay Cycle-by-Cycle Current Limiting ` Programmable Current Limit Threshold` ...

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SeekIC No. : 004536183 Detail

UCD8220: Features: ` For Digitally Managed Power Supplies Using ` 25-ns Input-to-Output Propagation Delay Cs or the TMS320 ™ DSP Family ` 25-ns Current Sense-to-Output Propagation` Voltage or Peak Curr...

UCD8220 Data Sheet

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Part Number:
UCD8220
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` For Digitally Managed Power Supplies Using
` 25-ns Input-to-Output Propagation Delay Cs or the TMS320 ™ DSP Family
` 25-ns Current Sense-to-Output Propagation
` Voltage or Peak Current Mode Control with Delay Cycle-by-Cycle Current Limiting
` Programmable Current Limit Threshold
` Clock input from Digital Controller to set Operating Frequency and Max Duty Cycle
` 4.5-V to 15.5-V Supply Voltage Range
` Analog PWM Comparator
` Rated from -40°C to 105°C
` 2-MHz Switching Frequency
` 110-V Input Startup Circuit and Thermal Shutdown (UCD8620)
` Internal Programmable Slope Compensation Supplies
` 3.3-V, 10-mA Linear Regulator
` DSP/C Compatible Inputs Converters
` Dual ±4-A TrueDrive™ High Current Drivers


Application

· Digitally Managed Switch Mode Power Supplies
· Push-Pull, Half-Bridge, or Full-Bridge Converters
· Battery Chargers


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER
UCD8x20
UNIT
VI Input Line Voltage UCD8620 only
110
V
VDD Supply Voltage  
16
IDD Supply Current Quiescent
20
mA
Switching,TA = 25°C,TJ = 125°C,VDD = 12 V
200
VO Output Gate Drive Voltage OUT
-1 to PVDD
V
IO(sink) Output Gate Drive Current OUT
4.0
A
IO(source)
-4.0
  Analog Input ISET, CS, CTRL, ILIM
-0.3 to 3.6
V
  Digital I/O's CLK, CLF
-0.3 to 3.6
  Power Dissipation TA = 25°C (PWP-16 package)
2.67
W
TA = 25°C (QFN-16 package)
-
TA = 25°C (QFN-20 package)
-
TJ Junction Operating Temperature UCD8220
-55 to 150
UCD8620
-55 to 130
Tstg Storage Temperature
-65 to 150
HBM ESD Rating(3) Human body model
2000
V
CDM Change device model
500
  Lead Temperature (Soldering, 10 sec)
300

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device.  hese are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal.
(3) Tested to JEDEC standard EIA/JESD22 - A114-B.



Description

The UCD8220 and UCD8620 are members of the UCD8K family of analog pulse-width modulator devices to be used in digitally managed power supplies using a microcontroller or the TMS320™ DSP family.

UCD8220 and UCD8620 are double-ended PWM controllers configured with push-pull drive logic. The UCD8620 has a 110-V high-voltage startup circuit which can directly start up the controller from a 48-V telecom input line.

Systems using UCD8K devices close the PWM feedback loop with traditional analog methods, but the UCD8K controllers include circuitry to interpret a time-domain digital pulse train. The pulse train contains the operating frequency and maximum duty cycle limit which are used to control the power supply operation. This eases implementation of a converter with high level control features without the added complexity or possible PWM resolution limitations of closing the control loop in the discrete time domain.

The UCD8220 and UCD8620 can be configured for either peak current mode or voltage mode control. They provide a programmable current limit function and a digital output current limit flag which can be monitored by the host controller to set the current limit operation. For fast switching speeds, the output stages use the TrueDrive™ architecture, which delivers rated current of ±4 A into the gate of a MOSFET. Finally they also include a 3.3-V, 10-mA linear regulator to provide power to the digital controller or act as a reference in the system.

The UCD8K controller family is compatible with the standard 3.3-V I/O ports of UCD9K digital power controllers, DSPs, Microcontrollers, or ASICs and is offered in PowerPAD™ HTSSOP and QFN packages.




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