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부품번호 ZD832 기능
기능 Universal Transformerless AC-DC Constant Current LED Driver
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ZD832 데이터시트, 핀배열, 회로
ZD832 Transformerless LED Driver
Zywyn
Advance Product Informationwww.DataSheet4U.com
ZD832
Universal Transformerless AC-DC Constant Current LED Driver
Features
• AC to DC Constant Current Driver
• No Transformer, No External Bridge Rectier
• 85VAC to 240VAC Input Voltage Range
• Programmable up to 30mA Constant Output Current
• PWM or Analog Dimming Control
• Over-Temperature Protection
• Over-Voltage Limiting on Internal Power Transistor
• High Voltage Static Circuit Design With No EMI
• Thermally Enhanced 20-Lead Exposed TSSOP Green
Package
Applications
• Ofine LED Lamps and Fixtures
• LCD Panel Display Backlighting
• Avionics Displays
• Decorative Lighting
• Industrial Lighting
Pin Conguration
VAC- 1
VAC- 2
NC 3
NC 4
NC 5
PWM 6
VCAP 7
ISET 8
NC 9
SGND 10
ZD832
20 VAC+
19 VAC+
18 NC
17 NC
16 HVCC
15 NC
14 VOUT
13 VOUT
12 PGND
11 PGND
General Description
The ZD832 is a high voltage, transformerlessAC-DC constant
current driver for driving a string of white or RGB LEDs in
series. It operates from an universal input voltage of 85VAC
to 240VAC and generates a programmable constant output
current. The high operating voltage of ZD832, along with its
linear control architecture eliminates the need for an external
inductor, transformer and rectifying diode bridge. The output
current level is set by a single resistor and can be set as high
as 30mA. Dimming control can be accomplished by using
pulse-width modulation signal with varying duty cycle on the
PWM pin or by applying an analog DC voltage on the ISET
pin. Thermal and over-voltage circuitry protects the internal
power transistors from excessive power dissipation.
The ZD832 is available in a thermally enhanced 20-pin ex-
posed TSSOP green package.
Ordering Information
Part Number
ZD832LEY
ZD832EVB
Temperature Range
–40°C to +85°C
n/a
Package Type
20-EP TSSOP
Evaluation Board
Please contact the factory for pricing and availability on Tape-on-Reel
option.
Typical Application
18050~240VAC
CVCAP
1μF
+
-
VCAP
ZD832
COUT
10μF
ILEVD
20-Pin Exposed TSSOP
WARNING! This is a high voltage application circuit
where Galvanic Isolation is not provided. Dangerous
voltages are present when connected to the AC line. It
is the responsibility of the engineer employing the ZD832
to ensure adequate safeguards are put in place to protect
the end user from electrical hazardous shock.
VOUT
REXT
[ILED]=[2500/(RSET)]
Figure 1. ZD832 driving a string of LEDs in series at a pre-
setted constant current
Zywyn Specications subject to change without notice
Zywyn Corporation • Tel (408) 733-3225 • Fax (408) 733-32061 • Email [email protected] • www.zywyn.com January 2007
rev. 1.0




ZD832 pdf, 반도체, 판매, 대치품
Zywyn Corporation
Block Diagram
ZD832
www.DataSheet4U.com
VAC+
VAC-
VCAP
VOUT
Fig.2. ZD832 Typical Block Diagram
Pin Description
Pin Number
1, 2
19, 20
6
7
8
10
11, 12
13, 14
16
3, 4, 5, 9, 15, 17, 18
Pin Name
VAC-
VAC+
PWM
VCAP
ISET
SGND
PGND
VOUT
HVCC
NC
Pin Function
High Voltage AC Input, from 85~240VAC.
High Voltage AC Input, from 85~240VAC.
LED Control Pin, Pulse-width Modulated or logic high/low Input.
Internal Regulator Output. Bypass this pin with a 1μF capacitor to SGND.
LED Current Setting Pin. Connect RSET from ISET to PGND to set the LED
current.
Signal Ground. Connects all small signal components to this ground.
Power Ground. Connects high voltage decoupling capacitor to this ground.
LED Driver open-drain Output. Constant current sinking outputs rated for 100V.
High Voltage Rectied DC Output from VAC+ & VAC-. Bypass HVCC with at
least 10μF to PGND.
No Connect Pins. Must be left open and unconnected.
Specications subject to change without notice
4 January 2007
rev. 1.0

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ZD832 전자부품, 판매, 대치품
Zywyn Corporation
Application Note
Operation for VAC from 200V~240V and 100 LEDs
An input voltage of 240VAC can be applied to VAC+ and
VAC- pin. The output at HVCC will be at 336VDC (240V
2) and the limiting REXT is set at 550Ω, assuming 100
LEDs in series with Vf of 3.2V are being used. Figure 5
shows the typical circuit.
ZD832
www.DataSheet4U.com
Operation for VAC from 200V~240V and 30 LEDs
An input voltage of 240VAC can stepped down by using
an external RC circuit to about 100VAC across VAC+ and
VAC-. The output at HVCC is rectied at 142VDC (100V
2) and the limiting REXT is set be 220Ω, assuming 30
LEDs in series with Vf of 3.2V are being used. Figure 6
shows the typical circuit
RAC
68Ω*
200~240VAC
CVCAP
1μF
+
-
VCAP
ZD832
COUT
10μF
100
LEDs
RSET
120KΩ
VOUT
REXT
550Ω
* See Note 1.
RAC
470KΩ∗∗
+
200~240VAC
-
0.47μF/250V
100VAC
CVCAP
1μF
VCAP
ZD832
COUT
10μF
30
LEDs
REXT
220Ω
VOUT
RSET
120KΩ
** See Note 2.
Figure 5. Driving 100 LEDs with the ZD832 from a power
source of 240VAC with 20mA output current.
Figure 6. Driving 30 LEDs with the ZD832 from a power
source of 240VAC with 20mA output current.
* Note 1. A non-ammable metal-lm resistor, RAC, should
beused to limit inrush current spikes during start-up and
transient voltage induced in the AC-power line by incidental
lightning strike. In normal operations, the AC current does not
exceed 30mARMS, and a 47Ω-82Ω, 0.25W reistor provides
sufcient current limiting.
** Note 2. RAC should be in the range of 390KΩ~680KΩ,
0.25W when used in the external RC circuit.
Specications subject to change without notice
7 January 2007
rev. 1.0

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부품번호상세설명 및 기능제조사
ZD832

Universal Transformerless AC-DC Constant Current LED Driver

Zywyn
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