RD2 데이터 시트보기 (PDF) - Power Integrations, Inc
부품명
상세내역
일치하는 목록
RD2
Power Integrations, Inc
RD2 Datasheet PDF : 12 Pages
| |||
Component Listing
Reference
U1
D1
D2
D3
BR1
VR1
L1
L2
C1, C9
C2
C3
C5
C6
C7
RA, RB
R1
R2
T1
F1
Figure 5. Parts List for the RD2.
Value
600V, 1A, UFR
Schottky, 3A, 60V
75 V Switching
1 A, 600 V
200 V Zener, 1.5 W
3.3 µH, 4A
8 mH, 0.2A
10 µF, 200V
330 µF, 16V
120 µF, 16V
47 µF, 10V
47 nF, 250 VAC, X 2
1 nF, 250 VAC, Y1
470 K, 1/4 W
6.8 Ω, 1/4 W
390 ohms, 1 W
Custom
2A, 250 VAC
RD2
Part Number
Manufacturer
TOP210PFI
Power Integrations
UF4005
General Instruments
MBR360
Motorola
1N4148
Rohm
DF06M
General Instruments
BZY97-C200
SGS/Thomson, Fagor
Custom
SU9V-02080
Tokin
KMG200VB10RM10X16 United Chemicon
LXF16VB331M8X15
United Chemicon
LXF16VB121M6.3X11.5 United Chemicon
KME10VB47RM5X12.5 United Chemicon
F1772-347-2000
Roederstein
DE1110 E 102M ACT4K-KD Murata
5043CX470K0J
Philips
5043CX6R800J
Philips
MO-1 391J
Koa/Speer
T1RD2
19372, 2A
Wickman
General Circuit Description
The RD2 is a low-cost, isolated Buck-Boost or flyback switching
power supply using the TOP210 integrated circuit. The circuit
shown in Figure 3 produces a 12 V, 8 W power supply that
operates from 85 to 132 VAC or 170 to 264 VAC input voltage.
The 12 V output voltage is determined by the TOPSwitch
control pin shunt regulator voltage, the voltage drop of D3, and
the turns ratio between the bias and output windings of T1.
Other output voltages are also possible by adjusting the
transformer turns ratios. R1 and C5 provide filtering of the bias
winding to improve line and load regulation.
AC power is rectified and filtered by BR1, C1 and C9 to create
the high voltage DC bus applied to the primary winding of T1.
The other side of the transformer primary is driven by the
integrated high-voltage MOSFET inside the TOP210. JP1 is
a jumper used to select 115 V or 230 V operation. Adding JP1
selects 115 V operation. Leaving JP1 open selects 230 V
operation. RD2 is supplied with JP1 open. RA and RB equalize
leakage currents between C1 and C9. D1 and VR1 clamp the
leading-edge voltage spike caused by transformer leakage
inductance to a safe value and reduce ringing. The power
secondary winding is rectified and filtered by D2, C2, L1, and
C3 to create the 12 V output voltage. R2 provides a pre-load on
the 12 V output to improve load regulation at light loads. The
bias winding is rectified and filtered by D3, R1, and C5 to create
a bias voltage to the TOP210. Common-mode EMI currents
which flow between the primary windings of the transformer
and the secondary output circuitry are attenuated by L2 and C7.
Differential-mode EMI currents caused by pulsating currents at
the input of the power supply are attenuated by C6 and L2. C5
filters the internal MOSFET gate drive charge current spikes on
the Control pin, determines the auto-restart frequency, and
together with R1, compensates the control loop.
The circuit performance data shown in Figures 6-18 was
measured with AC voltage applied to the RD2.
Load Regulation (Figure 6) - The amount of change in the DC
output voltage for a given change in output current is referred
to as load regulation. The 12 V output stays within ±5% from
10% to 100% of rated load current. The TOPSwitch on-chip
overtemperature protection circuit will safely shut down the
power supply under sustained overload conditions.
3 B
5/96
Share Link: