EVL6562A-LED STMicroelectronics, EVL6562A-LED Datasheet - Page 17

• 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
Going into further detail, we also have to consider the delay of the current sense comparator
(tdel) and modify
Equation 40
With:
Equation 41
Equation 42
Equation 43
And with
Equation 44
And
Equation 45
With the values of our application:
Equation 46
Equation 47
Equation 48
Equation 40
Equation 38
_ I
+
_ I
+
_ I
VLed
Led
VLed
Led
toff
Led
:
Equation 33
_
_
*
=
avg
_
*
avg
⎡
⎢
⎣
that now becomes:
⎡
⎢
⎣
avg
⎛
⎜
⎝
1.57
⎛
⎜
⎝
Rs
Rs
1
_ I
=
1
=
=
⎛
⎜
⎝
⎞
⎟
⎠
Led
⎛
⎜
⎝
⎞
⎟
⎠
⎛
⎜
⎝
Rs
*
μ
⎛
⎜
⎝
Rs
1
*
Rs
⎛
⎜
⎝
1
Rs
S,
L
1
⎛
⎜
⎝
as follows.
Doc ID 15679 Rev 1
Rb
Ra
1
_
⎞
⎟
⎠
2
Rb
Ra
⎛
⎜
⎝
_ I
⎞
⎟
⎠
⎞
⎟
⎠
*
Ra
Rb
tdel
( )
avg
⎞
⎟
⎠
*
toff
=
⎡
⎢
⎣
⎞
⎟
⎠
del
*
⎡
⎢
⎢
⎣
Vth
⎞
⎟
⎠
−
⎡
⎢
⎢
⎣
⎛
⎜
⎜
⎝
Vth
⎞
⎟
⎠
−
Vth
470
=
1
=
+
=
=
1
2
*
_ I
*
2
(
⎛
⎜
⎝
1
⎛
⎜
⎝
⎛
⎜
⎝
0.2
*
2
tdel
⎛
⎜
⎝
⎛
⎜
⎝
2
tdel
Ra
*
Led
toff
8 .
⎛
⎜
⎝
Ra
L
toff
10
L
⎛
⎜
⎝
Ra
L
Ra
/ L
)
μ
Ra
+
toff
−
⎞
⎟
⎠
⎞
⎟
⎠
Ra
=
_
+
S,
⎞
⎟
⎠
6
⎤
⎥
⎦
Rb
Rs
+
*
pk
Rb
(
−
−
⎞
⎟
⎟
⎠
(
Rb
. 0
Vin
L
⎛
⎜
⎝
=
VLed
⎞
⎟
⎠
⎞
⎟
⎠
985
−
⎞
⎟
⎠
tdel
−
+
(
=
⎞
⎟
⎠
. 1
L
−
1
−
⎛
⎜
⎝
−
Vin
470
68
2
Vin
/ L
VLed
*
Vin
⎞
⎟
⎠
_ I
tdel
*
10
⎤
⎥
⎦
*
*
⎛
⎜
⎝
Rs
rip
*
10
⎛
⎜
⎝
tdel
−
*
μ
⎡
⎢
⎣
Rb
Ra
L
6
⎛
⎜
⎝
⎡
⎢
⎣
)
⎞
⎟
⎠
+
−
H,
S )
⎛
⎜
⎝
Rb
Ra
4
Rb
Ra
_ I
⎞
⎟
⎠
⎞
⎟
⎠
)
S
⎤
⎥
⎦
Rs
⎞
⎟
⎠
del
+
⎞
⎟
⎠
−
Vin
−
⎛
⎜
⎝
=
⎛
⎜
⎝
/ L
tdel
/ L
2.8
*
tdel
Rs
⎛
⎜
⎝
Rs
Circuit description
tdel
L
⎞
⎟
⎠
Ω
⎤
⎥
⎦
⎞
⎟
⎠
⎤
⎥
⎥
⎦
⎤
⎥
⎦
⎞
⎟
⎠
⎤
⎥
⎥
⎦
+
+
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