LED5000PHR STMicroelectronics, LED5000PHR Datasheet - Page 28

• 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
28/51
higher than this value to compensate for the losses in the overall application. For this
reason, the conduction losses related to the R
●
Equation 38
Where T
switching losses when driving an inductive load (see
switching time.
Figure 18. Switching losses
●
Equation 39
Example (see
V
The typical output voltage is:
Equation 40
R
IN
DSON_HS
=42 V, V
Switching losses due to turning ON and OFF. These are derived using the following
equation:
Quiescent current losses.
RISE
P
has a typical value of 200
SW
FW_LED
and T
Chapter 5.6
=
V
IN
=3.7 V, n
FALL
I
OUT
represent the switching times of the power element that cause the
V
):
OUT
LED
Doc ID 023951 Rev 1
---------------------------------------- -
T
=8, I
=
RISE
n
LED
LED
+
2
P
T
Q
FALL
at 25 °C.
=1500 mA
V
=
FW_LED
V
IN
DSON
F
SW
I
+
Q
=
V
increase compared to an ideal case.
FB
V
Figure 18
IN
=
29.4V
I
OUT
). T
T
SW
SW_EQ
is the equivalent
F
SW
LED5000
AM13502v1