LV5027M-TLM-H ON Semiconductor, LV5027M-TLM-H Datasheet - Page 6

• Manufacturer Part Number: LV5027M-TLM-H
• Description: LED Lighting Drivers LED DRIVER IC
• Manufacturer: ON Semiconductor

Specifications of LV5027M-TLM-H

• Rohs: yes
• Input Voltage: - 0.3 V to + 42 V
• Maximum Supply Current: 3 A
• Maximum Operating Temperature: + 125 C
• Package / Case: MFP-10S
• Minimum Operating Temperature: - 30 C
• Power Dissipation: 1 W

Relation ship beween VREF and CS pin voltage
coil is a triangular wave shown in the figure below. Make sure to set Ipk so that (average of current value at one cycle) is
equal to (LED current value).Ipk is set by the relationship between VREF(internal reference voltage) voltage and Rcs
voltage.
The output current value is the average of the current value that flows during one cycle. The current value that flows into
(0.605Vtyp)
VREF
CS
+
-
under drawing
Vac
Vac2
CLK
RESET
FET current
(primary side)
TRIAC dimmer,OFF
Dummy load,ON(OUT2;high)
Q
a blockdiagram in outline
T
OUT
Vac1
REF_IN
REF_IN
Rcs
L
Ipk: peak inductor current
VIN: AC power-supply voltage (minimum value)
VREF: Built-in reference voltage (0.605V)
Rcs: External sense resistor
Ipk 
FET gate voltage
LED current
a blockdiagram in outline
VREF
LV5027M
Rcs
Ton
T
(FET current=Vcs/Rcs)
Ipk(=VREF/Rcs)
ON
OFF
VREF(0.605Vtyp)
Vdcmin
PS No.A1950-6/12