ZXLD1370Q

Document number: DS37117 Rev. 1 - 2

3 of 37

www.diodes.com

August 2015

© Diodes Incorporated

ZXLD1370Q

Pin Name

Pin

Type

(Note 5)

Function

SGND

6

P

Signal ground (Connect to 0V)

PGND

7

P

Power ground - Connect to 0V and pin 8 to maximize copper area

N/C

8

-

Not Connected internally

– recommend connection to pin 7, (PGND), to maximize PCB copper for

thermal dissipation

N/C

9

Not Connected internally

– recommend connection pin 10 (GATE) to permit wide copper trace to gate

of MOSFET

GATE

10

O

Gate drive output to external NMOS transistor

– connect to pin 9

11

P

Auxiliary positive supply to internal switch gate driver.

to application section for more details)

Decouple to ground with capacitor close to device (refer to Applications section)

12

P

Input supply to device (6V to 60V).

Decouple to ground with capacitor close to device (refer to Applications section)

ISM

13

I

The nominal voltage across the resistor is 225mV

FLAG

14

O

Flag open drain output

Pin is high impedance during normal operation

Pin switches low to indicate a fault, or warning condition

PWM

15

I

Digital PWM output current control

Pin driven either by open Drain or push-pull 3.3V or 5V logic levels.

Drive with frequency higher than 100Hz to gate output ‘on’ and ‘off’ during dimming control.

The device enters standby mode when PWM pin is driven with logic low level for more than 15ms

nominal (Refer to application section for more details)

GI

16

I

Gain setting input

Used to set the device in Buck mode or Boost, Buck-boost modes

Connect to ADJ in Buck mode operation

For Boost and Buck-boost modes, connect to resistive divider from ADJ to SGND. This defines the ratio

of switch current to LED current (see application section). The GI pin has an internal clamp that limits

the internal node to less than 3V. This provides some failsafe should they get overdriven

EP

PAD

P

Exposed paddle. Connect to 0V plane for electrical and thermal management

Symbol

Parameter

Rating

Unit

Input Supply Voltage Relative to GND

-0.3 to +65

V

Auxiliary Supply Voltage Relative to GND

-0.3 to +65

V

Current Monitor Input Relative to GND

-0.3 to +65

V

-0.3 to +5

V

Gate Driver Output Voltage

-0.3 to +20

V

Gate Driver Continuous Output Current

18

mA

Flag Output Voltage

-0.3 to 40

V

Other Input Pins

-0.3 to +5.5

V

Maximum Junction Temperature

+150

°C

Storage Temperature

-55 to +150

°C

Note:

6. For correct operation, SGND and PGND should always be connected together.

Caution:

Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;

functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not implied.

Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.