Datasheet

4

002-34772 Rev. *F

2023-06-13

EZ-PD™ PAG2P primary-side startup controller

Pinout

1Pinout

Figure 1

Pin map (SOIC-14)

Table 1

EZ-PD™ PAG2P pin description

Pin number

Pin name

Description

1HV

High voltage start-up power supply input. HV is the power supply source during the

start-up phase. This pin can be connected to either the bridge rectifier output or

directly to the AC mains through the diodes. This pin has a maximum voltage rating

of 500 V.

2,3

NC

No connect

4GDH

High-side gate driver logic signal output. This pin is connected to high side FET via

external high-side floating driver IC

5PULSEIN Pulse edge transformer (PET) input. EZ-PD™ PAG2P synchronizes to the secondary

side pulses received at the PULSEIN input.

6SS

External soft-start ramp capacitor terminal. This pin connects to the other end of

the pulse transformer. The external capacitor connected to the SS pin determines

the soft-start time.

7RT

External timing resistor or bias current source. The RT pin is used to connect to an

external timing resistor of 50 kΩ which determines the free running oscillator

frequency. Oscillator frequency is typically 30 kHz.

8GND

Ground

9CS

Current sense input. Current sense input is used to provide overcurrent or

short-circuit protection. Protection is provided by two current sense thresholds,

CSTH1 (pulse by pulse) and CSTH2 (Short circuit) in the primary side by turning OFF

the primary FET.

10

GDL

Primary FET low-side gate driver signal

11

VCC

Low voltage power supply input

12

BSW

Boost converter switch node connected to drain terminal of internal HV NFET. This

pin is connected to external boost inductor and diode.

13

BGND

Boost converter return pin connected to source terminal of internal HV NFET. This

pin is connected to GND.

14

OVP_AUX

Auxiliary winding overvoltage detection input. EZ-PD™ PAG2P monitors this pin for

overvoltage condition of secondary side, using an external resistor divider. Any

voltage exceeding V_OVPAUXRISE on this pin is treated as an overvoltage fault

condition. The overvoltage condition is monitored only during startup or open

loop operation.

HV

1

NC

2

NC

3

GDH

4

PULSEIN

5

SS

6

RT

7

OVP_AUX

14

BGND

13

BSW

12

VCC

11

GDL

10

CS

9

GND

8