LED5000PHR STMicroelectronics, LED5000PHR Datasheet - Page 14

• Manufacturer Part Number: LED5000PHR
• Description: Current & Power Monitors & Regulators 3A monolithic Conv 850kHz Synch
• Manufacturer: STMicroelectronics

Specifications of LED5000PHR

• Rohs: yes
• Product: Current Regulators
• Supply Voltage - Max: 48 V
• Supply Voltage - Min: 5.5 V
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Package / Case: HPSO-8
• Accuracy: +/- 3 %
• Input Voltage Range: 5.5 V to 48 V
• Output Current: 23 uA
• Sensing Method: High or Low Side
• Supply Current: 1.7 mA

Application notes - buck conversion
5.3
14/51
Equation 2
Equation 3
where:
Equation 4
S
(V
harmonic oscillations at duty cycle over 50%
The sampling effect contribution F
Equation 5
where:
Equation 6
and
Equation 7
Error amplifier compensation network
The external compensation network connected at the output of the error amplifier is
dimensioned to stabilize the system depending on the application conditions.
n
PP
represents the slope of the sensed inductor current, S
peak to peak amplitude) that implements the slope compensation to avoid sub-
P
Doc ID 023951 Rev 1
=
Q
----------------------------------------
R
F
LOAD
P
H
H
S
(s) is:
=
S
s
m
n
e
--------------------------------------------------------------- -
Z
C
=
1
=
=
=
=
V
----------------------------- -
C
n
------------------------------------------ -
1
V
IN
m
OUT
----------------------------------
ESR
1
=
+
pp
C
+
–
-------------------- -
L
V
n
S
------
S
+
OUT
e
n
f
s
1
SW
m
----------------------------------------------- -
1
1
f
1 D
C
Q
SW
L
C
–
OUT
P
+
C
R
s
-----
1 D
OUT
–
CS
2
2
n
0.5
–
e
the slope of the external ramp
–
f
SW
0.5
LED5000