EVL6562A-LED STMicroelectronics, EVL6562A-LED Datasheet - Page 7

• Manufacturer Part Number: EVL6562A-LED
• Description: EVALUATION MODULE L6562A
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL6562A-LED

• Current - Output / Channel: 350mA
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable
• Voltage - Input: 48V
• Utilized Ic / Part: L6562A
• Input Voltage: 48 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6562A
• Other names: 497-10420

AN2983
Figure 4.
Other than the power and ground connections being exchanged, there are no differences
between the two configurations; the behavior and dimensioning of the inverse buck are the
same as that of the standard buck. Refer to application note AN2928
description and design rules. The following are a reminder of the fundamental applicable
equations.
Inductor current variation (charging period)
Equation 1
Inductor current variation (discharging period)
Equation 2
The circuit works in continuous conduction mode, then in steady-state the current variations
during ton and toff are the same (in module) and equivalent to the ripple current I_rip.
Ripple current
Equation 3
Duty cycle
Equation 4
Additionally, the average current of the LED can be expressed as:
a. See
Standard buck converter
Chapter 5: References on page
Doc ID 15679 Rev 1
Δ
30.
_ I
_ I
Δ
rip
ton
D
_ I
=
toff
=
=
Figure 5.
⎡
⎢
⎣
Δ
ton
⎡
⎢
⎣
_ I
T
=
Vin
⎡
⎢
⎣
⎤
⎥
⎦
ton
VLed
=
−
L
L
⎡
⎢
⎣
VLed
=
VLed
Vin
⎤
⎥
⎦
Δ
∗
_ I
Inverse buck converter
⎤
⎥
⎦
toff
⎤
⎥
⎦
toff
∗
ton
(a)
for a detailed
Circuit description
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