Datasheet LT8714 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Bipolar Output Synchronous Controller with Seamless Four Quadrant Operation |
| Pages / Page | 36 / 1 — FEATURES. DESCRIPTION. Bipolar Output Cleanly Transitions Through 0V. … |
| File Format / Size | PDF / 1.9 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Bipolar Output Cleanly Transitions Through 0V. Output Can Source or Sink Current for Any. Output Voltage
Model Line for this Datasheet
Text Version of Document
LT8714 Bipolar Output Synchronous Controller with Seamless Four Quadrant Operation
FEATURES DESCRIPTION
n
Bipolar Output Cleanly Transitions Through 0V
The LT®8714 is a synchronous PWM DC/DC controller n
Output Can Source or Sink Current for Any
designed for a four quadrant output converter. The output
Output Voltage
voltage cleanly transitions through zero volts with sourcing n
CTRL Pin Externally Sets Output Voltage
and sinking output current capability. n
Wide Input Range: 4.5V to 80V
The LT8714 is ideal for regulating to positive, negative, n
Power Good Indication Pin (PG)
or zero volts when configured for the novel four quadrant n Switching Frequency Up to 750kHz topology. Applications include four quadrant power sup- n Can Be Synchronized to an External Clock plies, high power bidirectional current sources, active n High Gain EN Pin Accepts Slowly Varying Input Signals loads, and high power, low frequency signal amplification. n 20-Lead TSSOP Exposed Pad Package In addition, the LT8714 incorporates a power good feature to let the user know if VOUT is above or below its target
APPLICATIONS
regulation voltage. n Four Quadrant Power Supplies n Bidirectional Current Sources The LT8714’s switching frequency range can be programmed n High Power, Low Frequency Signal Amplification between 100kHz and 750kHz via a resistor from the RT pin n Test and Measurement to GND. A SYNC pin is also provided if the user would like n Electronic Window Tinting to synchronize the part to an external clock. Additional L features such as current limiting and soft-start are included. , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patent The LT8714 is available in a 20-lead TSSOP package. pending.
TYPICAL APPLICATION 200kHz, –5V to 5V Output from a 10V to 14V Input
6mΩ ISN 22µF ×2 ISP V 10µH • 10µH • IN TG VOUT
V
10V –5V TO 5V
OUT Cleanly Transitions
TO 14V 22µF ±5A MAX
from –5V to 5V (VIN = 12V)
×4 100µF VCTRL 2.5mΩ ×4 1V/DIV TG VOUT 5V/DIV 0V BG CSN CSP TG 73.2k VIN ISN ISN 0A 51.1k I ISP ISP L1 + IL2 VIN 10A/DIV EN BIAS 10k 2.2µF 2.2µF INTV LT8714 3.9ms/DIV 8714 TA01b CC INTVEE PG FB 178k 0.1V FOR –5V RT OUT CTRL VCTRL = 0.55V FOR 0VOUT SYNC VC 1.0V FOR 5VOUT GND IMON SS 4.75k 100pF 100nF 68nF 470nF 10nF 8714 TA01a 8714f For more information www.linear.com/LT8714 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Appendix Typical Applications Package Description Typical Application Related Parts
FEATURES DESCRIPTION
n
Bipolar Output Cleanly Transitions Through 0V
The LT®8714 is a synchronous PWM DC/DC controller n
Output Can Source or Sink Current for Any
designed for a four quadrant output converter. The output
Output Voltage
voltage cleanly transitions through zero volts with sourcing n
CTRL Pin Externally Sets Output Voltage
and sinking output current capability. n
Wide Input Range: 4.5V to 80V
The LT8714 is ideal for regulating to positive, negative, n
Power Good Indication Pin (PG)
or zero volts when configured for the novel four quadrant n Switching Frequency Up to 750kHz topology. Applications include four quadrant power sup- n Can Be Synchronized to an External Clock plies, high power bidirectional current sources, active n High Gain EN Pin Accepts Slowly Varying Input Signals loads, and high power, low frequency signal amplification. n 20-Lead TSSOP Exposed Pad Package In addition, the LT8714 incorporates a power good feature to let the user know if VOUT is above or below its target
APPLICATIONS
regulation voltage. n Four Quadrant Power Supplies n Bidirectional Current Sources The LT8714’s switching frequency range can be programmed n High Power, Low Frequency Signal Amplification between 100kHz and 750kHz via a resistor from the RT pin n Test and Measurement to GND. A SYNC pin is also provided if the user would like n Electronic Window Tinting to synchronize the part to an external clock. Additional L features such as current limiting and soft-start are included. , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patent The LT8714 is available in a 20-lead TSSOP package. pending.
TYPICAL APPLICATION 200kHz, –5V to 5V Output from a 10V to 14V Input
6mΩ ISN 22µF ×2 ISP V 10µH • 10µH • IN TG VOUT
V
10V –5V TO 5V
OUT Cleanly Transitions
TO 14V 22µF ±5A MAX
from –5V to 5V (VIN = 12V)
×4 100µF VCTRL 2.5mΩ ×4 1V/DIV TG VOUT 5V/DIV 0V BG CSN CSP TG 73.2k VIN ISN ISN 0A 51.1k I ISP ISP L1 + IL2 VIN 10A/DIV EN BIAS 10k 2.2µF 2.2µF INTV LT8714 3.9ms/DIV 8714 TA01b CC INTVEE PG FB 178k 0.1V FOR –5V RT OUT CTRL VCTRL = 0.55V FOR 0VOUT SYNC VC 1.0V FOR 5VOUT GND IMON SS 4.75k 100pF 100nF 68nF 470nF 10nF 8714 TA01a 8714f For more information www.linear.com/LT8714 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Appendix Typical Applications Package Description Typical Application Related Parts
