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PDF ELM650DA Data sheet ( Hoja de datos )
| Número de pieza | ELM650DA | |
| Descripción | CC/CV Mode 36V step down 2A DC/DC converter | |
| Fabricantes | ELM | |
| Logotipo |  |
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ELM650DA CC/CV Mode 36V step down 2A DC/DC converter
■General description
ELM650DA is a step down switching regulator, which has a built-in 40V P-channel power MOSFET for
delivering output current. ELM650A is designed to allow for operating a wide supply voltage range from 8V to
36V and capable of delivering 2A output current.
ELM650DA features programmable CV/CC mode control functions, the CV mode (Constant Voltage) function
to provide a regulated voltage output and the CC mode (Constant Current) function provide a current limitation
function, it is suitable for the DC/DC switching power applications when requested the current limitation
function.
■Features
• CC/CV mode control
• Soft start function for start-up
• Output over-voltage protection
• Over temperature protection
• Fold back short-circuit protection
• High efficiency operation
• Input voltage range
: 8V to 36V
• Input voltage surge
: 40V
• Fixed operating frequency
: 100kHz
• Voltage reference accuracy
: ±1%
• Current limit accuracy
: ±4%
• Package
: SOP-8
■Application
• Car charger
• Portable charger applications
• DC/DC converters with current limited
• General purpose CV/CC power supply
■Maximum absolute ratings
Parameter
Symbol
Limit
VCC to GND
Vcc -0.3 to +40.0
LX to VCC
LX +0.3 to -40.0
VSEN to GND
Vsen
-0.3 to +7.0
ISEN+ to GND
ISEN+
-0.3 to +7.0
ISEN- to GND
ISEN-
-0.3 to +7.0
OVP to GND
OVP
-0.3 to +7.0
COMP to GND
COMP
-0.3 to +7.0
Output current
Icc 3
Power dissipation at Ta <60 °C
Pd
0.75
Operationg temperature
Top
-40 to +85
Storage temperature range
Tstg
-60 to 150
Caution:Permanent damage to the device may occur when ratings above maximum absolute ones are used.
Unit
V
V
V
V
V
V
V
A
W
°C
°C
■Selection guide
ELM650DA-N
Symbol
a Package
b Product version
c Taping direction
* Taping direction is one way.
D: SOP-8
A
N: Refer to PKG file
ELM650DA - N
↑↑ ↑
ab c
10 - 1
Rev.1.2
1 page  
ELM650DA CC/CV Mode 36V step down 2A DC/DC converter
BOM list for application circuits
Device
Description
C1 Input ECAP, 47µF/35V, 6.3*7mm
C2 Input ECAP, 100µF/35V, 6.3*7mm
C3 MLCC, 0603, X7R
C4 MLCC, 0603, X7R
C5 MLCC, 0603, NPO
C6 MLCC, 0805, X7R
C7 Output ECAP, 220µF/6.3V, 6.3φ*7mm
C8 MLCC, 0603, X7R
C9 MLCC, 0603, X7R
C10 MLCC, 0603, X7R
D1 Schottky diode, SMB, 40V/5A
L1 DR Choke, 4φ*6mm
L2 Power inductor, T- 5052B, L= 100µH wire=0.65
L3 T Core, 6*3*3, 0.5φ*2C*3Ts
L4 SMD bead core , 0805, 220Ω 3000mA
LED LED, GREEN
R1 Chip R , 0603 , 5%
R2 Chip R , 0805 , 5%
R3 Chip R , 0603 , 5%
R4 Chip R , 0603 , 5%
R5 Chip R , 1206 , 1%
R6 Chip R , 0603 , 1%
R7 Chip R , 0603 , 1%
R8 Chip R , 0603 , 5%
R9 Chip R , 0603 , 5%
R10 Chip R , 0603 , 5%
U1 Buck controller, CC/CV function, Vin 8~36V, SOP-8
Value
47µF/35V
100µF/35V
104
473
47pF
102
220µF/6.3V
NA
104
104
SB54
15µH
100µH
22µH
BEAD
LED
100K
10R
51R
51R
0.045R
390K
118K
470R
120R
1K
ELM650DA
Q'ty
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
■Application notes
1. Output voltage setting
Figure 1 shows the connections for setting the output voltage value. Typically, selecting the proper ratio of the
two feedback resistors Rvsen1 and Rvsen2 by using Rvsen2 ≈ 118kΩ and determining Vsen from the following
equation: Rvsen1 = Rvsen2 ( Vout / 1.18V - 1 )
Vout
ELM650DA Vsen
RVsen1
RVsen2
Fig-1: Output voltage setting
10 - 5
Rev.1.2
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ELM650DA.PDF ] | |
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