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Teilenummer | IZ9921 |
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Beschreibung | HIGH-VOLTAGE LED DRIVER | |
Hersteller | Integral | |
Logo | ||
Gesamt 8 Seiten IZ9921, IZ9922, IZ9923
HIGH-VOLTAGE LED DRIVER WITH BUILT-IN MOSFET SWITCH
IZ9921, IZ9922, IZ9923 are high-voltage LED driver control ICs with built-in MOSFET switch and
intended for LED lighting control. They allow efficient operation of LED strings from voltage
sources ranging up to 400VDC. The IZ9921/22 includes an internal high-voltage switching
MOSFET controlled with fixed off-time TOFF of approximately 10µs. The LED string is driven at
constant current, thus providing constant light output and enhanced reliability. The output current is
internally fixed at 20mA for IZ9921, 50mA for IZ9922 and 30mA for IZ9923. The peak current con-
trol scheme provides good regulation of the output current throughout the universal AC line voltage
range of 85 to 264VAC or DC input voltage of 20 to 400V.
Main features:
• Operating temperature range -40 … +85 ºС;
• ON-resistance of the MOSFET switch 210 Ohm;
• OFF-state breakdown voltage of the MOSFET switch not less 500 V;
• ESD level 500V
Table 1 – Contact pad description
Contact pad
number
Symbol
01 TST Test pad
02 PR3 Test pad
03 PR2 Test pad
04 TR Test pad
05 PR1 Test pad
06 PR4 Test pad
07 UDD Supply voltage pad
08 TU Test pad
09
GND
Ground
10 PU1 Test pad
11 PU2 Test pad
12 PU3 Test pad
13
DRAIN
MOSFET switch drain pad
14
GND
Ground
Description
Note –
1 Contact pad 01 - 06, 08, 10, 11, 12, 14 (test pads) are used for testing process on manufactur-
ing fab only (have not to be bonded by customer).
2 Contact pad 09, 14 (Ground) are electrically connected
Ver.00/19.01.2009
1 IZ9921-TSe+
431104
IZ9921, IZ9922, IZ9923
FS
≈ VIN − VO
VIN * TOFF
(8)
The switching power loss associated with turn-off transitions of the DRAIN pin can be disregarded.
Due to the large amount of parasitic capacitance connected to this switching node, the turn-off
transition occurs essentially at zero-voltage. Conduction power loss in the IZ9921/22/23 can be
calculated as:
PCOND
≈
IO2
* RON
* VO
VIN
+ I DD * (VIN
− VO )
(9)
where RON is the ON resistance, IDD is the internal linear regulator current.
PTOTAL = PSWITCH + PCOND
(10)
Ver.00/19.01.2009
6 IZ9921-TSe+
431104
6 Page | ||
Seiten | Gesamt 8 Seiten | |
PDF Download | [ IZ9921 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
IZ9921 | HIGH-VOLTAGE LED DRIVER | Integral |
IZ9922 | HIGH-VOLTAGE LED DRIVER | Integral |
IZ9923 | HIGH-VOLTAGE LED DRIVER | Integral |
Teilenummer | Beschreibung | Hersteller |
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