SI9122ADLP-T1-E3 datasheet(6/20 Pages) VISHAY

Part #	SI9122ADLP-T1-E3

Description	500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers

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Manufacturer	VISHAY [Vishay Siliconix]

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Document Number: 73492

S-80038-Rev. D, 14-Jan-08

Vishay Siliconix

Si9122A

Notes:

a. Refer to PROCESS OPTION FLOWCHART for additional information.

b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum (- 40 °C to 85 °C).

c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.

d. FMIN when VCL_CONT at clamp level. Typical foldback frequency change + 20 %, - 30 % over temperature.

e. Measured on SRL or SRH outputs.

f. See figure 3 for Break-Before-Make time definition.

g. VUVLO tracks VREG1 by a diode drop.

h. Guaranteed by design and characterization, not tested in production.

SPECIFICATIONSa

Parameter

Symbol

Test Conditions

Unless Otherwise Specified

fNOM = 500 kHz, VIN = 75 V

VINDET = 7.5 V; 10.5 V ≤ VCC ≤ 13.2 V

Limits

- 40 to 85 °C

Unit

Min.b

Typ.c

Max.b

Synchronous Rectifier (SRH, SRL) Drivers

Output High Voltage

VOH

Sourcing 10 mA

VCC - 0.4

V

Output Low Voltage

VOL

Sinking 10 mA

0.4

Break-Before-Make Timef

tBBM1

TA = 25 °C, RBBM = 33 kΩ, See Figure 3

55

ns

tBBM2

40

tBBM3

TA = 25 °C, RBBM = 33 kΩ, LX = 75 V

35

tBBM4

55

Peak Output Source

ISOURCE

VCC = 10.5 V

- 100

mA

Peak Output Sink

ISINK

100

Rise Time

tr

CSRH = CSRL = 0.3 nF

35

ns

Fall Time

tf

35

Voltage Mode

Error Amplifier

td1DH

Input to High-Side Switch Off

< 200

ns

td2DL

Input to Low-Side Switch Off

< 200

Current Mode

Current Amplifier

td3DH

Input to High-Side Switch Off

< 200

ns

td4DL

Input to Low-Side Switch Off

< 200

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