Vin Window - Analog Devices ADP1055-EVALZ User Manual

ADP1055-EVALZ User Guide
Figure 42. IIN_OC_FAULT under Short-Circuit
Fault Response Set to Shut down and Retry 3 Times
Green Trace: Output Voltage
Yellow Trace: Primary Current
Things to Try
1. Trigger other faults, such as VIN_UV_FAULT,
GPIOx_FAULT, IN_OC_FAST, POUT_OP, and
TON_MAX.
2. Enable the end of cycle shutdown feature (PWM window).

VIN WINDOW

The VIN window sets the thresholds for VIN_OV, VIN_UV,
VIN_ON, and VIN_OFF. The corresponding faults can be set
up in the Fault Response window. In the Additional Settings
bar, the voltage feedforward function can be enabled.
Since the ADP1055 is a secondary side controller, the input
voltage is not available to the IC before switching begins. Thus,
VIN_ON is set to 0 V.
Figure 43. VIN Window
Figure 44. Line Voltage Feedforward DISABLED, 5 A Load
Figure 45. Line Voltage Feedforward Enabled, 5 A Load
Figure 46. Line Voltage Feedforward Enabled, 0 A Load, Light Load Mode;
Green Trace: AC-Coupled Output Voltage;
Rev. B | Page 15 of 43
Green Trace: AC Coupled Output Voltage
Blue Trace: Input Voltage
Green Trace: AC Coupled Output Voltage
Blue Trace: Input Voltage
Blue Trace: Input Voltage
UG-710