HVLED805 STMicroelectronics, HVLED805 Datasheet - Page 24

• Manufacturer Part Number: HVLED805
• Description: IC LED DRVR ACDC OFFLINE 16NSOIC
• Manufacturer: STMicroelectronics

Specifications of HVLED805

• Constant Current: Yes
• Constant Voltage: Yes
• Internal Driver: Yes
• Type - Primary: General Purpose
• Mounting Type: Surface Mount
• Topology: AC DC Offline Switcher, PWM
• Number Of Outputs: 1
• Voltage - Supply: 11.5 V ~ 23 V
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency: -
• Voltage - Output: -
• Operating Temperature: -

Application information
Figure 19. Hiccup-mode OCP: timing diagram
5.10
24/29
V
SOURCE
Vcc
Vcc
Vcc
Vcs
V
V
CC
DS
OFF
rest
ON
dis
before the V
result in a low-frequency intermittent operation (Hiccup-mode operation), with very low
stress on the power circuit. This special condition is illustrated in the timing diagram of
Figure 18
Layout recommendations
A proper printed circuit board layout is essential for correct operation of any switch-mode
converter and this is true for the HVLED805 as well. Careful component placing, correct
traces routing, appropriate traces widths and compliance with isolation distances are the
major issues. In particular:
●
●
1 V
The compensation network should be connected as close as possible to the COMP
pin, maintaining the trace for the GND as short as possible
Signal ground should be routed separately from power ground, as well from the sense
resistor trace.
.
Secondary diode is shorted here
CC
capacitor is charged again and the device restarted. Ultimately, this will
Doc ID 18077 Rev 1
Two switching cycles
HVLED805
t
t
t