ALTAIR04-900TR Просмотр технического описания (PDF) - STMicroelectronics

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производитель

ALTAIR04-900TR

Off-line all-primary-sensing switching regulator

STMicroelectronics 

Electrical characteristics

ALTAIR04-900

Symbol

Table 4. Electrical characteristics (continued)

Parameter

Test conditions

Min. Typ. Max. Unit

Zero-current detector

IZCDb

VZCDH

VZCDL

VZCDA

VZCDT

IZCDON

Input bias current

Upper clamp voltage

Lower clamp voltage

Arming voltage

Triggering voltage

Min. source current during MOSFET on-time

TBLANK Trigger blanking time after MOSFET turn-off

Line feed-forward

RFF Equivalent feed-forward resistor

Transconductance error amplifier

VREF Voltage reference

gm Transconductance

Gv Voltage gain

GB Gain-bandwidth product

Source current

ICOMP

Sink current

VCOMPH Upper COMP voltage

VCOMPL Lower COMP voltage

VCOMPBM Burst-mode threshold

Hys Burst-mode hysteresis

Current reference

VIREFx

GI

VCREF

Maximum value

Current loop gain

Current reference voltage

Current sense

tLEB Leading-edge blanking

td(H-L) Delay-to-output

VCSx

VCSdis

Max. clamp value

Hiccup-mode OCP level

1. Parameters track one to each other

VZCD = 0.1 to 3 V

IZCD = 1 mA

IZCD = - 1 mA

Positive-going edge

Negative-going edge

VCOMP ≥ 1.3 V

VCOMP = 0.9 V

0.1 1 µA

3.0 3.3 3.6 V

-90 -60 -30 mV

100 110 120 mV

50 60 70 mV

-25 -50 -75 µA

6

µs

30

IZCD = 1 mA

45

Ω

Tj = 25 °C (1)

Tj = -40 to 125 °C and

Vcc = 12 V to 23 V (1)

2.46 2.5 2.54

V

2.42

2.58

ΔICOMP = ±10 µA

VCOMP = 1.65 V

Open loop

1.3 2.2 3.2 mS

73

dB

500

KHz

VZCD = 2.3 V, VCOMP = 1.65 V 70 100

µA

VZCD = 2.7 V, VCOMP = 1.65 V 400 750

µA

VZCD = 2.3 V

2.7

V

VZCD = 2.7 V

0.7

V

1

V

65

mV

VCOMP = VCOMPL (1)

VCOMP = VCOMPH

1.5 1.6 1.7 V

0.5 0.6 0.7

0.38 0.4 0.42 V

dVcs/dt = 200 mV/µs (1)

(1)

200 250 300 ns

300

ns

0.7 0.75 0.8 V

0.92 1 1.08 V

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DocID18211 Rev 3

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