HVLED805 STMicroelectronics, HVLED805 Datasheet - Page 19

• 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: -

HVLED805
Equation 6
Combining (2), (3) (5) and (6):
Equation 7
This formula shows that the average output current does not depend anymore on the input
or the output voltage, neither on transformer inductance values. The external parameters
defining the output current are the transformer ratio n and the sense resistor R
Figure 15. Current control principle
Aux
R dmg
DMG
Rfb
Doc ID 18077 Rev 1
D EMAG
LOGIC
I
OUT
I =
P
=
n
2
R
S
R
⋅
SENSE
V
R
V
C
Q
SENSE
CLED
.
ILED
R
Q1
Iref
CLED
Application information
F rom R sense
+
-
CC
SENSE
To PWM Logic
.
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