LV5026M-TLM-H ON Semiconductor, LV5026M-TLM-H Datasheet - Page 9

• Manufacturer Part Number: LV5026M-TLM-H
• Description: LED Lighting Drivers LED DRIVER IC
• Manufacturer: ON Semiconductor

Specifications of LV5026M-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

・LED current and inductande setting
Relation ship beween REF_IN and CS pin voltage(Power Factor Crrection(PFC))
Setting Zener 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 REF_IN voltage and Rcs voltage. This relationship
make Power Factor Correction (PFC).Therefore, it is available to make LED current a sine curve.
operation is not normal. Using Zener diode prevents incorrect operating during VAC voltage lower than Vf.In detail, refer to [LED
current and inductance setting]
Vzd depend on LED voltage (VF). Choose Zener diode around Vf (LED voltage).When VAC voltage is lower than Vf, LED
In case of REF_IN pin open, this error amplifier negative input(-) is under control of internal VREF voltage(0.605Vtyp).
The output current value is the average of the current value that flows during one cycle. The current value that flows into
a blockdiagram in outline
R1
Vzd
R2
REF_IN
CS
VAC voltage is Low,
OUT2 is High voltage.
VREF
(0.605Vtyp)
+
-
-
CLK
RESET
under drawing
Q
TRIAC dimmer,OFF
a blockdiagram in outline
OUT
Rcs
L
REF_IN
LV5026M
Ipk: peak inductor current
Vf: LED forward voltage drop
Vac: effective value,R.M.S value
VREF: Built-in reference voltage (0.605V)
VREF_IN:REF_IN voltage(6 pin)
Rs: External sense resistor
Vzd:Zener diode voltage(REF_IN pin)
Ipk
FET current
FET


Vac
Ton

Vzd
Rcs


R
Toff
1
R

2
R
(primary side）
Vac
2
VREF(0.605Vtyp)
REF_IN
FET current
ON
OFF
T
PS No.A1950-9/18
a blockdiagram in out