LED5000PHR STMicroelectronics, LED5000PHR Datasheet - Page 17

• 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

LED5000
5.5
5.6
Figure 9.
As a consequence the LED equivalent circuit gives the
voltage with the high impedance FB input:
Equation 13
Total loop gain
In summary, the open loop gain can be expressed as:
Equation 14
Compensation network design
The maximum bandwidth of the system can be designed up to f
small signal model.
Equation 15
where
calculations are valid in the hypothesis that BW >
P
(
Equation 3
Load equivalent circuit
) is the pole introduced by the power components. The following
G s
VIN
VIN
VIN
VIN
LED
Doc ID 023951 Rev 1
=
-------------
2
n
G
LED
P
CO
D D
D1
D1
=
s
BW BW
------------------------------------------------------------
n
LED
A
0
s
R
r
MAX
LED
SENSE
L L
L L
P
LED
Application notes - buck conversion
+
=
which is the typical condition.
R
COUT
COUT
COUT
COUT
f
-------- -
SW
SENSE
6
LED
n
LED
(s) term correlating the output
SW
Rd1
Rd1
Rd2
Rd2
Dled1
Dled1
Dled2
Dled2
Rs
Rs
Rs
Rs
/6 to guarantee a valid
AM13493v1
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