Fairchild FAN3111C service manual

FAN3111 — Single 1A High-Speed, Low-Side Gate Driver

July 2012

Features



1.4A Peak Sink / Source at VDD = 12V

 1.1A Sink / 0.9A Source at V

OUT

= 6V

 4.5 to 18V Operating Range  FAN3111C Compatible with FAN3100C Footprint  Two Input Configurations:  Dual CMOS Inputs Allow Configuration as

Non-Inverting or Inverting with Enable Function

 Single Non-Inverting, Low-Voltage Input for

Compatibility with Low-Voltage Controllers

 Small Footprint Facilitates Distributed Drivers for

Parallel Power Devices

 15ns Typical Delay Times  9ns Typical Rise / 8ns Typical Fall times with 470pF

Load

 5-Pin SOT23 Package  Rated from –40°C to 125°C Ambient

Applications

Switch-Mode Power Supplies

  Synchronous Rectifier Circuits  Pulse Transformer Driver  Logic to Power Buffer  Motor Control

Description

The FAN3111 1A gate driver is designed to drive an Nchannel enhancement-mode MOSFET in low-side switching applications.

Two input options are offered: FAN3111C has dual CMOS inputs with thresholds referenced to V with PWM controllers and other input-signal sources that operate from the same supply voltage as the driver. For use with low-voltage controllers and other input-signal sources that operate from a lower supply voltage than the driver, that supply voltage may also be used as the reference for the input thresholds of the FAN3111E. This driver has a single, non-inverting, low-voltage input plus a DC input V in the range 2 to 5V.

The FAN3111 is available in a lead-free finish industrystandard 5-pin SOT23.

for an external reference voltage

XREF

for use

DD

Figure 1. FAN3111C (Top View)

Figure 2. FAN3111E (Top View)

Ordering Information

FAN3111 — Single 1A High-Speed, Low-Side Gate Driver

Part Number

Input

Threshold

Package Packing Method

Quantity per

Reel

FAN3111CSX CMOS 5-Pin SOT23 Tape & Reel 3,000

(2)

Θ

Tape & Reel

(3)

Θ

JT

JA

(4)

Ψ

JB

(5)

Ψ

3,000

(6)

JT

Units

FAN3111ESX External 5-Pin SOT23

Thermal Characteristics

(1)

Package

5-Pin SOT23

Θ

JL

58 102 161 53 6 °C/W

Notes:

1. Estimates derived from thermal simulation; actual values depend on the application.

2. Theta_JL (Θ

): Thermal resistance between the semiconductor junction and the bottom surface of all the leads

JL

(including any thermal pad) that are typically soldered to a PCB.

3. Theta_JT (ΘJT): Thermal resistance between the semiconductor junction and the top surface of the package, assuming it is held at a uniform temperature by a top-side heatsink.

4. Theta_JA (Θ

): Thermal resistance between junction and ambient, dependent on the PCB design, heat sinking,

JA

and airflow. The value given is for natural convection with no heatsink using a 2S2P board,, as specified in JEDEC standards JESD51-2, JESD51-5, and JESD51-7, as appropriate.

5. Psi_JB (Ψ

): Thermal characterization parameter providing correlation between semiconductor junction

JB

temperature and an application circuit board reference point for the thermal environment defined in Note 4. For the MLP-8 package, the board reference is defined as the PCB copper connected to the thermal pad and protruding from either end of the package. For the SOIC-8 package, the board reference is defined as the PCB copper adjacent to pin 6.

6. Psi_JT (Ψ

): Thermal characterization parameter providing correlation between the semiconductor junction

JT

temperature and the center of the top of the package for the thermal environment defined in Note 4.

Pin Definitions

Pin # Name Description

1 VDD

2 GND

3 IN+

4

IN–

XREF

5 OUT

Supply Voltage. Provides power to the IC.

Ground. Common ground reference for input and output circuits.

Non-Inverting Input. Connect to VDD to enable output.

FAN3111C Inverting Input. Connect to GND to enable output.

FAN3111E External Reference Voltage. Reference for input thresholds, 2V to 5V.

Gate Drive Output. Held low unless required inputs are present.

Output Logic with Dual-Input Configuration

IN+ IN− OUT

(7)

0

0 0

(7)

0

1

1 0 1

1 1

Note:

7. Default input signal if no external connection is made.

(7)

0

(7)

0

Block Diagrams

IN+

3

100kΩ

FAN3111 — Single 1A High-Speed, Low-Side Gate Driver

1

VDD

5

OUT

IN-

XREF

V

DD

100kΩ

4

Figure 3. FAN3111C Simplified Block Diagram

100kΩ

2

GND

1

VDD

4

2

5

OUT

GND

IN+

3

100kΩ

Figure 4. FAN3111E Simplified Block Diagram

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.

FAN3111 — Single 1A High-Speed, Low-Side Gate Driver

Symbol Parameter Min. Max.

Uni

t

VDD VDD to GND -0.3 20.0 V

VIN Voltage on IN to GND

FAN3111C -0.3 V

FAN3111E -0.3 V

V

Voltage on XREF to GND FAN3111E -0.3 5.5 V

XREF

V

Voltage on OUT to GND -0.3 VDD+0.3 V

OUT

+ 0.3 V

DD

+0.3 V

XREF

TL Lead Soldering Temperature (10 Seconds) +260 ºC

TJ Junction Temperature +150 ºC

T

Storage Temperature -65 +150 ºC

STG

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings.

Symbol Parameter Min. Max. Unit

VDD Supply Voltage Range 4.5 18.0 V

VIN Input Voltage IN

FAN3111C 0 V

FAN3111E 0 V

V

External Reference Voltage XREF FAN3111E 2.0 5.0 V

XREF

V

DD

V

XREF

TA Operating Ambient Temperature -40 +125 ºC

FAN3111 — Single 1A High-Speed, Low-Side Gate Driver

Electrical Characteristics

Unless otherwise noted, VDD = 12V, V device and negative out of the device.

Symbol Parameter Conditions Min. Typ. Max. Unit

Supply

VDD Operating Range 4.5 18.0 V

IDD Static Supply Current Inputs Not Connected 5 10 µA

Inputs (FAN3111C)

V

IN Logic, Low-Voltage Threshold 30 38 %VDD

IL_C

V

IN Logic, High-Voltage Threshold 55 70 %VDD

IH_C

I

IN Current, Low IN from 0 to VDD -1 175 µA

INL

I

IN Current, High IN from 0 to VDD -175 1 µA

INH

V

Input Hysteresis Voltage 17 %VDD

HYS_C

Inputs (FAN3111E)

V

IN Logic, Low-Voltage Threshold 25 30 %V

IL_E

V

IN Logic, High-Voltage Threshold 50 60 %V

IH_E

I

IN Current, Low IN from 0 to V

INL

I

IN Current, High IN from 0 to V

INH

V

Input Hysteresis Voltage 20 %V

HYS_E

Output

I

OUT Current, Mid-Voltage, Sinking

SINK

I

OUT Current, Mid-Voltage, Sourcing

SOURCE

I

OUT Current, Peak, Sinking

PK_SINK

I

PK_SOURCE

tD1, tD2 Output Prop. Delay

Notes:

8. Not tested in production.

9. See Timing diagrams.

OUT Current, Peak, Sourcing

t

Output Rise Time

RISE

t

Output Fall Time

FALL

I

Output Reverse Current Withstand

RVS

(9)

C

(9)

C

(9)

= 3.3V, TJ = -40°C to +125°C. Currents are defined as positive into the

XREF

-1 50 µA

XREF

-50 1 µA

XREF

(8)

OUT at V C

LOAD

OUT at V C

LOAD

(8)

C

(8)

C

FAN3111C: 0 - 12V

/2,

DD

= 47nF, f = 1KHz

/2,

DD

= 47nF, f = 1KHz

1.1 A

-0.9 A

= 47nF, f = 1KHz 1.4 A

= 47nF, f = 1KHz -1.4 A

= 470pF 9 18 ns

= 470pF 8 17 ns

,

IN

1V/ns Slew Rate

15 30 ns

FAN3111E: 0 - 3.3VIN, 1V/ns Slew Rate

(8)

250 mA

XREF

Timing Diagrams

90%

Output

10%

V

IN+

INH

V

INL

FAN3111 — Single 1A High-Speed, Low-Side Gate Driver

90%

Output

10%

V

IN -

t

D1

t

D2

INH

V

INL

t

D1

t

D2

t

RISE

t

FALL

t

FALL

t

RISE

Figure 5. Non-Inverting Waveforms Figure 6. Inverting Waveforms

Fairchild FAN3111C service manual

Specifications and Main Features

Frequently Asked Questions

User Manual