ZLED7x30 Datasheet

20

April 20, 2016

LX

GND

DIM1

DIM2

NC

NC

ISENSE

VIN

• Because Rs is typically a low value resistor, it is important to consider the resistance of the traces in series with

RS as part of the total current sense resistance. Use traces that are as short and wide as possible to minimize

this effect.

• The ZLED7x30’s DIM pins are high impedance inputs. When left floating, these pins are pulled up to 3.3V by

internal circuitry. Avoid running high voltage traces close to the DIM pins.

4

ESD Protection

All pins have an ESD protection of

≥ ±3000V according to the Human Body Model (HBM). The ESD test follows the

Human Body Model with 1.5

kΩ/100 pF based on MIL 883-H, Method 3015.8.

5

Pin Configuration and Package

Figure 5.1

ZLED7x30 Pin Configuration

Table 5.1

ZLED7x30 Pin Descriptions—SOP-8 Package

Pin

No.

Description (Also see section 3.3 for layout guidelines)

VIN

1

Input voltage (8.5V to 40V).

ISENSE

2

Current adjustment input. Resistor RS from ISENSE to VIN determines the nominal average output

current. IOUTnom =0.1V/RS

NC

3

Not connected; keep floating.

NC

4

Not connected; keep floating.

DIM2

5

Set the number of current levels and current ratio of each level of switch dimming function as follows:

DIM1 Pin

DIM2 Pin

Dimming Mode

Floating

Floating

No dimming

Floating

GND

Three levels: 100%, 50%, 20%

GND

Floating

Three levels: 100%, 60%, 30%

GND

GND

Two levels: 100%, 30%

DIM1

6

GND

7

Connect to GND.

LX

8

Drain of internal power switch