NCP3065D3SLDGEVB ON Semiconductor, NCP3065D3SLDGEVB Datasheet - Page 2

• Manufacturer Part Number: NCP3065D3SLDGEVB
• Description: EVAL BOARD FOR NCP3065D3SLDG
• Manufacturer: ON Semiconductor

Specifications of NCP3065D3SLDGEVB

• Design Resources: NCP3065D3SLDGEVB BOM NCP3065D3SLDGEVB Gerber Files NCP3065D3SLDGEVB Schematic
• Current - Output / Channel: 700mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 7 ~ 23 V
• Voltage - Input: 12V
• Utilized Ic / Part: NCP3065
• Core Chip: NCP3065
• Topology: SEPIC
• No. Of Outputs: 1
• Output Current: 1A
• Output Voltage: 23V
• Dimming Control Type: PWM
• Development Tool Type: Hardware - Eval/Demo Board
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: NCP3065D3SLDG
• Other names: NCP3065D3SLDGEVBOS

November 2007, Rev.2
Schematic
Design Notes
voltage range can overlap the output voltage range. The basic schematic is shown in Figure 2.
connected in parallel to L2, and energy from CP is transferred to L2. The voltage across L2 is the
same as the CP voltage, which is the same as the input voltage. At this time, the diode is reverse
biased and COUT supplies output current.
and COUT. This current recharges CP for the next cycle. Current from L2 also flows through D1 to
the load and COUT that is recharging for the next cycle.
coupled. Another advantage is that if coupled inductors are used there is very small input current
ripple.
A SEPIC (single-ended primary inductance converter) is distinguished by the fact that its input
When switch SW is ON, energy from the input is stored in inductor L1. Capacitor CP is
If the switch SW is OFF, current in L1 flows through CP and D1 then continues to the load
Inductors L1 and L2 could be uncoupled, but then they must be twice as large as if they are
Values of coupled inductors are set by these equations:
where r is the maximum inductor current ripple factor.
L
Figure 2 – Generalized SEPIC schematic
Δ
1
2 ,
Figure 1 – SEPIC converter schematic
I
D
=
=
r
V
=
⋅
IN
2
V
I
⋅
OUT
OUT
min
f
Δ ⋅
V
1
min
⋅
OUT
−
I
D
D
www.onsemi.com
D
DN06031/D
+
min
=
V
=
2
IN
0
⋅
8 .
min
250
⋅
8
0
⋅
7 .
⋅
. 0
=
10
⋅
47
7
1
3
2 .
7
−
⋅
. 0
. 0
2 .
+
. 0
47
51
8
47
=
=
=
. 0
15
. 0
47
0 .
51
μ
A
H
2