RDK-138 Power Integrations, RDK-138 Datasheet - Page 12

• Manufacturer Part Number: RDK-138
• Description: KIT REF DESIGN 1.2W PS TN FAMILY
• Manufacturer: Power Integrations

Specifications of RDK-138

• Mfg Application Notes: LinkSwitch-TN Design Guide, AN-37
• Main Purpose: AC/DC, Non-Isolated
• Outputs And Type: 2, Non-Isolated
• Power - Output: 1.2W
• Voltage - Output: 12V, 5V
• Current - Output: 80mA, 50mA
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Buck
• Frequency - Switching: 66kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LNK304
• Product: Accessories & Kits
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 596-1197

Rev. I 11/08
NOTES:
A. Total current consumption is the sum of I
B Since the output MOSFET is switching, it is diffi cult to isolate the switching current from the supply current at the
C. See Typical Performance Characteristics section Figure 14 for BYPASS pin start-up charging waveform.
D. This current is only intended to supply an optional optocoupler connected between the BYPASS and FEEDBACK
E. For current limit at other di/dt values, refer to Figure 13.
F. This parameter is guaranteed by design.
G. This parameter is derived from characterization.
H. Auto-restart on time has the same temperature characteristics as the oscillator (inversely proportional to
Figure 7. LinkSwitch-TN General Test Circuit.
Figure 8. LinkSwitch-TN Duty Cycle Measurement.
2-12
12
switching) and the sum of I
DRAIN. An alternative is to measure the BYPASS pin current at 6 V.
frequency).
pins and not any other external circuitry.
LNK302/304-306
50 V
S2
S1
and I
DSS
when FEEDBACK pin is shorted to SOURCE (MOSFET switching).
470 Ω
5 W
S1
and I
DSS
when FEEDBACK pin voltage is ≥2 V (MOSFET not
S
S
D
FB
BP
S
S
Figure 9. LinkSwitch-TN Output Enable Timing.
(internal signal)
DC
V
DRAIN
t
P
MAX
=
FB
f
OSC
1
470 kΩ
0.1 μF
t P
t EN
S2
50 V
PI-3707-112503
PI-3490-060204