FSL136HR

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3

PIN CONFIGURATION

Figure 3. Pin Configuration

8−DIP

Drain

Drain

Drain

GND

PIN DEFINITIONS

Pin No.

Name

Description

1

GND

Ground. SENSEFET source terminal on the primary side and internal control ground.

2

Positive Supply Voltage Input. Although connected to an auxiliary transformer winding, current is supplied from pin

the internal startup switch opens and device power is supplied via the auxiliary transformer winding.

3

Feedback Voltage. The non−inverting input to the PWM comparator, it has a 0.4 mA current source connected inter-

nally, while a capacitor and opto−coupler are typically connected externally. There is a delay while charging external

sient conditions, but still allows the protection mechanism to operate under true overload conditions.

4

Peak Current Limit. Adjusts the peak current limit of the SENSEFET. The feedback 0.4 mA current source is divert-

ed to the parallel combination of an internal 6 kW resistor and any external resistor to GND on this pin to determine

the peak current limit.

5

Startup. Connected to the rectified AC line voltage source. At startup, the internal switch supplies internal bias and

switch is opened.

6, 7, 8

Drain

Drain. Designed to connect directly to the primary lead of the transformer and capable of switching a maximum of

650 V. Minimizing the length of the trace connecting these pins to the transformer decreases leakage inductance.

Symbol

Parameter

Min

Max

Unit

−0.3

650

V

Drain Pin Voltage

−0.3

650

V

Supply Voltage

−

26

V

Feedback Voltage Range

−0.3

12.0

V

Continuous Drain Current

−

3

A

Drain Current Pulsed (Note 4)

−

12

A

Single Pulsed Avalanche Energy (Note 5)

−

230

mJ

Total Power Dissipation

−

1.5

W

Operating Junction Temperature

Internally Limited

°C

Operating Ambient Temperature

−40

+150

°C

Storage Temperature

−55

+150

°C

ESD

Human Body Model, JESD22−A114 (Note 6)

5.0

−

kV

Charged Device Model, JESD22−C101 (Note 6)

1.5

−