Rev. B 06/13

11

PFS7323-7329

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Output Power Table

eSIP Package

Product

Efficiency Power Mode R = 49.9 k

W

Full Power Mode R = 24.9 k

W

Maximum Continuous

Output Power Rating at

Peak Output Power

Maximum Continuous

Output Power Rating at

Peak Output Power

Maximum

Maximum

PFS7323L

60 W

80 W

90 W

85 W

110 W

120 W

PFS7324L

80 W

110 W

120 W

100 W

130 W

150 W

PFS7325L

110 W

150 W

165 W

140 W

185 W

205 W

PFS7326H

140 W

185 W

205 W

180 W

230 W

260 W

PFS7327H

175 W

230 W

255 W

220 W

290 W

320 W

PFS7328H

210 W

280 W

310 W

270 W

350 W

385 W

PFS7329H

235 W

320 W

345 W

293 W

380 W

425 W

Table 2. Output Power Table.

Notes:

1. See Key Application considerations.

2. Maximum practical continuous power at 90 VAC in an open-frame design with adequate heat sinking, measured at 50 °C ambient.

3. Recommended lower range of maximum continuous power for

best light load efficiency; HiperPFS-2 will operate and perform below this level.

4. Internal output power limit.

Hysteretic Thermal Shutdown

The thermal shutdown circuitry senses the controller die

temperature. The threshold is set at 117 °C typical with a 49 °C

hysteresis. When the die temperature rises above this threshold

(OTP) (117 °C +8/-7 °C), the controller initiates a fast soft-

shutdown and remains disabled until the die temperature falls

by ~49°C, at which point the device will re-initiate the soft-start

sequence.

In the event an OTP is detected when the VOLTAGE MONITOR

pin current is below I

soft-shutdown and remain disabled until all the conditions for

the start-up (soft-start sequence) are satisfied. In this mode of

operation the OTP hysteresis is disabled.

When soft-shutdown is initiated by an over-temperature fault

(OTP) the brown-out timer delay (t

behavior of OTP depends on the input voltage peak detected

following the thermal fault. If the input peak voltage detected

after the thermal fault is below I

however if the peak input voltage after the thermal fault is above

I

soft-start sequence.

The maximum time delay for soft-shutdown to occur after an

OTP event is detected is t

In the event the input voltage is reduced below the brown-in

threshold and an OTP event occurs (no OTP hysteresis) and the

input voltage is raised immediately above brown-in before the

controller junction temperature falls below the OTP threshold,

the controller will initiate a soft-start once the controller junction

is just below the OTP threshold. Depending on the system

thermal conditions, the controller could initiate OTP shutdown

again because of insufficient time to cool down the controller.

The OTP shutdown that occurs when the input voltage is above

brown-in will have hysteresis enabled.