NJW channel High Side Switch GENERAL DESCRIPTION PACKAGE OUTLINE

Transcription

1 -channel High Side Switch GENERAL DESCRIPTION The NJW483 is the single high-side switch that can supply.a. The active clamp circuit, overcurrent and thermal shutdown are built-in to Pch MOS FET. A logic signal (3V/5V) can be input directly. Especially, the NJW483 is suitable for various Sensors output block as PNP type. The FLT logic has two versions: Active-high (A-ver) and Active-low (B-ver). Also, The NJW483 is a complementary product to the NJW48. PACKAGE OUTLINE NJW483KH FEATURES Drain-Source Voltage 45V Output Current.A Corresponding with Logic Voltage Operation: 3V/5V Low On-Resistance.75 (typ.) Low Consumption Current A (typ.) Active Clamp Circuit Over Current Protection (Self recovery type current limiting function) Thermal Shutdown Package Outline DFN6-H (ESON6-H) PIN CONFIGURATION (Top View).. NC 3. OUT 4. IN 5. GND 6. FLT (Bottom View) Exposed PAD on backside connect to GND. BLOCK DIAGRAM FLT Over Current Protection FLT DELAY Level Shift IN Thermal Shut Down Active Clamp GND OUT Ver

2 ABSOLUTE MAXIMUM RATINGS (Ta=5 C) PARAMETER SYMBOL RATINGS UNIT REMARK Drain-Source Voltage V DS 45 V OUT Pin Supply Voltage V DD 45 V GND Pin Input Pin Voltage V IN -.3 to +6 V IN GND Pin FLT Pin Voltage V FLT -.3 to +6 V FLT GND Pin Power Dissipation P D 445 (*) 35 (*) mw Active Clamp Tolerance (Single Pulse) E AS mj Active Clamp Current I AP. A Junction Temperature T j -4 to +5 C Operating Temperature T opr -4 to +5 C Storage Temperature T stg -5 to +5 C (*): Mounted on glass epoxy board ( mm: based on EIA/JEDEC standard, Layers FR-4, with Exposed Pad) (*): Mounted on glass epoxy board ( mm: based on EIA/JEDEC standard, 4Layers FR-4, with Exposed Pad) (4Layers: Applying mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD5-5) RECOMMENDED OPERATING CONDITIONS (Ta=5 C) PARAMETER SYMBOL MIN. TYP. MAX. UNIT REMARK Drain Source Voltage V DS 4 V OUT Pin Supply Voltage V DD V GND Pin Output Current I O. A OUT Pin Input Pin Voltage V IN 5.5 V IN GND Pin FLT Pin Voltage V FLT 5.5 V FLT GND Pin PRODUCT VERSION PRODUCT NAME NJW483KH-A NJW483KH-B FLT LOGIC Active High Active Low - - Ver.5-6-

3 ELECTRICAL CHARACTERISTICS (Unless otherwise noted, V DS =3V, Ta=5 C) PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT Drain-Source Clamp Voltage V DSS_CL V IN =V, I O =ma, V DD =4V V DD -45 V High Level Input Voltage V IH I O =ma.64 V Low Level Input Voltage V IL I O = A.9 V Protection Circuit Function Input Voltage Range V IN_opr V OUT Pin Leak Current at State I OLEAKOUT V IN =V, V DD =4V A Quiscent Current I DD V IN =V, V DD =4V A Quiscent Current I DD V IN =5V 5 A Input Current I IN V IN =5V 5 9 A On-State Resistance R DS_ON V IN =5V, I O =.A.75. Over Current Protection I LIMIT V IN =5V, V DS =5V..4.8 A Turn-on Time t ON V IN = to 5V, I O =.A s Turn-off Time t V IN =5 to V, I O =.A s OUT Voltage Difference V PDOV V IN =V, I ORH =.A.85. V FLT Pin Low Level Output Voltage V VFLT I FLT =5 A.5.5 V FLT Pin Leak Current at State I OLEAKFLT V FLT =5.5V A FLT Delay Time t DFLT V IN = to 5V 5 ms Ver

4 TRUTH TABLE [A-version: Active-high] Input Signal Operating Condition FLT Pin Output Status L H Normal H L ON L H Over Current I LIMIT H H I LIMIT L H T j 5 C H H [B-version: Active-low] Input Signal Operating Condition FLT Pin Output Status L H Normal H H ON L H Over Current I LIMIT H L I LIMIT L H T j 5 C H L Ver.5-6-

5 TIMING CHART ON, Switching Time (V IN = to 5V, V DD =3V, I O =.A) IN 9% % 9% OUT % t ON t FLT Delay Time (V IN = to 5V, V DD = V DS =3V, FLT=Pull-up, OUT-GND shorting) [A-version: Active-high] IN 5% 9% FLT t DFLT [B-version: Active-low] IN 5% FLT % t DFLT Ver

6 [A-version: Active-high] High Input signal Low Over Current Protection ON ON Thermal Protection Output voltage V V DSS_CL Drain current I LIMIT A Inductive load t DFLT High Fault signal Low Normal Current limit Thermal shutdown Active clamp Ver.5-6-

7 [B-version: Active-low] High Input signal Low Over Current Protection ON ON Thermal Protection Output voltage V V DSS_CL Drain current I LIMIT A Inductive load t DFLT High Fault signal Low Normal Current limit Thermal shutdown Active clamp Ver

8 TYPICAL APPLICATION MCU NJW483 OUT FLT IN GND Load You should insert a pull-up resistor when you connect the FLT pin with other power supplies etc Ver.5-6-

9 CHARACTERISTICS Drain-Source Clamp Voltage [V] Drain-Source Clamp Voltage vs.ambient Temperature Consumption Current [μa] Quiscent Current vs. Ambient Temperature Consumption Current [μa] Quiscent Current vs.input Voltage Input Voltage [V] Input Current [μa] Input Current vs. Ambient Temperature Input Current vs. Input Voltage Input Current [μa] Input Voltage [V] Ver

10 CHARACTERISTICS ON-State Resistance vs. Output Current ON-State Resistance vs.supply Voltage.8.8 ON-State Resistance [Ω] ON-State Resistance [Ω] Output Current [ma] Supply Voltage [V] ON-State Resistance vs.ambient Temperature.8 ON-State Resistance [Ω] Output Current vs.drain-source Voltage Output Current vs.drain-source Voltage (Zoom-up) Output Current [A] Output Current [A] Drain-Source Voltage [V] Drain-Source Voltage [V] - - Ver.5-6-

11 CHARACTERISTICS Turn-on Time [μs] Turn-on Time vs.ambient Temperature Turn-off Time [μs] Turn-off Time vs.ambient Temperature FLT Pin Low Level Output Voltage [V] FLT Pin Low Level Output Voltage vs.ambient Temperature FLT Delay Time [ms] FLT Delay Time vs.ambient Temperature TSD Detection/Release Temperature [ºC] TSD Detection/Release Temperature vs. Input Voltage Detection Temp Release Temp Input Voltage [V] Over Current Protection [A] Over Current Protection vs.ambient Temperature Ver

12 Application Tips Regarding Active Clamp Capacity of High/Low side Switch Products Technical Information What is Active Clamp Capacity. The IC might suffer to damage by the inductive kickback at the transient time of ON state to state, when an inductive load such as a solenoid or motor is used for the load of the high-side/low-side switch. The protection circuit for the inductive kickback is the active clamp circuit. The energy that can be tolerated by the active clamp circuit is called "Active Clamp Capacity (E AS )". When using an inductive load to the high-side/low-side switch, you should design so that the E SW does not exceed the active clamp capability. IC operation without an external protection parts (Fig ) Active Clamp Current I AP t A Active Clamp Period I D V DS I D Active Clamp Current I AP Drain-Source Clamp Voltage V V DD Time V DS V DSS_CL Drain-Source Clamp Voltage V DSS_CL V V IN V V DD 5V Time V IN V 5V t A Active Clamp Period t ON t ON Fig. Active Clamp Waveform (Left: Low-side Switch / Light High-side Switch) At when the V IN turns off, the drain-source voltage (V DS ) increases rapidly by the behavior of the inductive load that is keeping current flowing. However, it will be clamped at V DSS_CL by the active clamp circuit. At the same time, the drain current is flowed by adjusting the gate voltage of the output transistor, and the energy is dissipated at the output transistor. The energy: E SW is shown by the following formula. E SW t A V ( t) I ( t) dt = DS D LI AP V V DSS _ CL DSS _ CL V DD The E SW is consumed inside IC as heat energy. However, the thermal shutdown does not work when the V IN is V. Therefore in worst case the IC might break down. When using the active clamp, you should design E SW does not exceed the E AS. - - Ver.5-6-

13 Application NJW483 Tips Technical Information Application Hint The simplest protection example is to add an external flywheel diode at the load to protect IC from an inductive kickback. (Fig.) Flywheeling Diode I D VIN DRAIN VIN OUT V DS SOURCE V DS GND I D Flywheeling Diode Fig. Application Circuit of Inductance Load Driving (Left: Low-side Switch / Light High-side Switch) [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver

14 PACKAGE OUT LINE DFN6-H (ESON6-H) GD-N6A- UNIT: mm Ver.5-6-