Datasheet hip6602 Datasheets

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Data Sheet August 2000
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HIP6602
FN4838.1
Dual Channel Synchronous-Rectified Buck MOSFET Driver
The HIP6602 is a high frequency, two power channel MOSFET driver specifically designed to drive four power N-Channel MOSFETs in a synchronous-rectified buck converter topology. These drivers combined with a HIP63xx series of Multi-Phase Buck PWM controller and Intersil’s UltraFETs® form a complete core voltage regulator solution for advanced microprocessors.
The HIP6602 drives both upper and lower gates over a range of 5V to 12V. This drive-voltage flexibility provides the advantage of optimizing applications involving trade-offs between switching losses and conduction losses.
The output drivers in the HIP6602 have the capacity to efficiently switch power MOSFETs at high frequencies. Each driver is capable of driving a 3000pF load with a 30ns propagation delay and 50ns transition time. This device implements bootstrapping on the upper gates with only a single external capacitor required for each power channel. This reduces implementation complexity and allows the use of higher performance, cost effective, N-Channel MOSFETs. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting simultaneously.
Ordering Information
Features
• Drives Four N-channel MOSFETs
• Adaptive Shoot-Through Protection
• Internal Bootstrap Devices
• Supports High Switching Frequency
- Fast Output Rise Time
- Propagation Delay 30ns
• Small 14-Lead SOIC Package
• 5V to 12V Gate-Drive Voltages for Optimal Efficiency
• Three-State Input for Bridge Shutdown
• Supply Under-Voltage Protection
Applications
• Core Voltage Supplies for Intel Pentium® III and AMD® AthlonTM Microprocessors.
• High Frequency Low Profile DC/DC Converters
• High Current Low Voltage DC/DC Converters
Pinout
HIP6602CB
(SOIC)
TOP VIEW
PART NUMBER
HIP6602CB 0 to 85 14 Ld SOIC M14.15 HIP6602CB-T 14 Ld SOIC Tape and Reel
TEMP. RANGE
(°C) PACKAGE PKG. NO.
PWM1 PWM2
GND
LGATE1
PVCC
PGND
LGATE2
1
1 2
2 3
4
5 6
14 13 12 11 10
9 87
VCC
PHASE1 UGATE1 BOOT1 BOOT2 UGATE2 PHASE2
1
Pentium
® is a registered trademark of Intel Corporation.; AMD® is a registered trademark of Advanced Micro Devices, Inc.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
UltraFET® is a registered trademark of Intersil Corporation. Athlon™ is a trademark of Advanced Micro Devices, Inc.
1-888-INTERSIL or 1-888-468-3774
| Copyright © Intersil Corporation 2000, 2005
Page 2
Block Diagram
HIP6602
PVCC
VCC
PWM1
PWM2
GND
+5V
10K
10K
+5V
10K
10K
HIP6602
CONTROL
LOGIC
SHOOT-
THROUGH
PROTECTION
PGND
PVCC
SHOOT-
THROUGH
PROTECTION
PGND
BOOT1
UGATE1
PHASE1
PVCC
LGATE1
PGND
BOOT2
UGATE2
PHASE2
PVCC
LGATE2
Typical Application - 2 Channel Converter Using a HIP6302 and a HIP6602 Gate Driver
+5V
BOOT1
UGATE1
PHASE1
LGATE1
PVCC
BOOT2
UGATE2
PHASE2
LGATE2
PGND
+12V
+V
+5V/12V
+12V
PGOOD
VID
FB
VSEN
FS/DIS
COMP
MAIN
CONTROL
HIP6302
GND
V
CC
ISEN1
PWM1
PWM2
ISEN2
+12V
VCC
PWM1
DUAL DRIVER HIP6602
PWM2
GND
CORE
2
Page 3
HIP6602
Typical Application - 4 Channel Converter Using a HIP6303 and HIP6602 Gate Driver
PGOOD
EN
VID
FB
VSEN
FS/DIS
COMP
MAIN
CONTROL
HIP6303
GND
V
CC
ISEN1
PWM1
PWM2
ISEN2
ISEN3 PWM3 PWM4
ISEN4
+5V
+12V
VCC
PWM1
PWM2
+12V
VCC
DUAL DRIVER HIP6602
BOOT1
UGATE1
PHASE1
LGATE1
PVCC
BOOT2
UGATE2
PHASE2
LGATE2
PGNDGND
BOOT3
UGATE3
PHASE3
+5V/12V
+12V
+12V
+12V
+V
CORE
LGATE3
DUAL
DRIVER
PVCC
+5V/12V
HIP6602
PWM3
PWM4
BOOT4
UGATE4
PHASE4
LGATE4
PGNDGND
+12V
3
Page 4
HIP6602
Absolute Maximum Ratings Thermal Information
Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15V
Supply Voltage (PVCC) . . . . . . . . . . . . . . . . . . . . . . . . . VCC + 0.3V
BOOT Voltage (V
BOOT
- V
) . . . . . . . . . . . . . . . . . . . . . . .15V
PHASE
Input Voltage (VPWM). . . . . . . . . . . . . . . . . . . . . .GND - 0.3V to 7V
UGATE. . . . . . . . . . . . . . . . . . . . . .V
LGATE. . . . . . . . . . . . . . . . . . . . . . . . .GND - 0.3V to V
PHASE
- 0.3V to V
BOOT PVCC
+ 0.3V + 0.3V
ESD Rating
Human Body Model (Per MIL-STD-883 Method 3015.7) . . . . .3kV
Machine Model (Per EIAJ ED-4701 Method C-111) . . . . . . .200V
Operating Conditions
Ambient Temperature Range. . . . . . . . . . . . . . . . . . . . . 0°C to 85°C
Maximum Operating Junction Temperature. . . . . . . . . . . . . . .125°C
Supply Voltage, VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V ±10%
Supply Voltage Range PVCC . . . . . . . . . . . . . . . . . . . . . 5V to 12V
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
1. θ
JA
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
VCC SUPPLY CURRENT
Bias Supply Current I Power Supply Current I
VCC
PVCC
POWER-ON RESET
VCC Rising Threshold 9.7 9.95 10.4 V VCC Falling Threshold 9.0 9.2 9.5 V
PWM INPUT
Input Current I
PWM
PWM Rising Threshold V PWM Falling Threshold V UGATE Rise Time TR LGATE Rise Time TR UGATE Fall Time TF LGATE Fall Time TF UGATE Turn-Off Propagation Delay TPDL LGATE Turn-Off Propagation Delay TPDL
UGATEVPVCC
LGATEVPVCC
UGATEVPVCC
LGATEVPVCC
UGATEVPVCC LGATEVPVCC
Shutdown Window 1.4 - 3.6 V Shutdown Holdoff Time - 230 - ns
OUTPUT
Upper Drive Source Impedance R
Upper Drive Sink Impedance R
Lower Drive Source Current I
Lower Drive Sink Impedance R
UGATEVVCC
UGATEVVCC
LGATE
LGATE
f
= 500kHz, V
PWM
f
= 500kHz, V
PWM
V
= 0 or 5V (See Block Diagram) - 500 - µA
PWM
= 12V 3.45 3.6 - V
PVCC
= 12V - 1.45 1.55 V
PVCC
= V = V = V = V
= V = V
= 12V, V
V
= V
VCC
= 12V, V = V
V
VCC
V
= 12V, V
VCC
V
= V
VCC
V
= 12V, V
VCC
Thermal Resistance (Note 1) θ
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Maximum Junction Temperature (Plastic Package) . . . . . . . .150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to 150°C
Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . .300°C
(SOIC - Lead Tips Only)
= 12V - 3.7 5.0 mA
PVCC
= 12V - 2.0 4.0 mA
PVCC
= 12V, 3nF Load - 20 - ns
VCC
= 12V, 3nF Load - 50 - ns
VCC
= 12V, 3nF Load - 20 - ns
VCC
= 12V, 3nF Load - 20 - ns
VCC
= 12V, 3nF Load - 30 - ns
VCC
= 12V, 3nF Load - 20 - ns
VCC
= 5V - 1.7 3.0 Ω
PVCC
= 12V - 3.0 5.0 Ω
PVCC
= 5V - 2.3 4.0 Ω
PVCC
= 12V - 1.1 2.0 Ω
PVCC
= 5V 400 580 - mA
PVCC
= 12V 500 730 - mA
PVCC
= 5V or 12V - 1.6 4.0 Ω
PVCC
(°C/W)
JA
4
Page 5
HIP6602
Functional Pin Descriptions
PWM1 (Pin 1) and PWM2 (Pin 2)
The PWM signal is the control input for the driver. The PWM signal can enter three distinct states during operation, see the three-state PWM Input section under DESCRIPTION for further details. Connect this pin to the PWM output of the controller.
GND (Pin 3)
Bias and reference ground. All signals are referenced to this node.
LGATE1 (Pin 4) and LGATE2 (Pin 7)
Lower gate drive outputs. Connect to gates of the low-side power N-Channel MOSFETs.
PVCC (Pin 5)
This pin supplies the upper and lower gate drivers bias. Connect this pin from +12V down to +5V.
PGND (Pin 6)
This pin is the power ground return for the lower gate drivers.
PHASE2 (Pin 8) and PHASE1 (Pin 13)
Connect these pins to the source of the upper MOSFETs and the drain of the lower MOSFETs. The PHASE voltage is monitored for adaptive shoot-through protection. These pins also provide a return path for the upper gate drive.
UGATE2 (Pin 9) and UGATE1 (Pin 12)
Upper gate drive outputs. Connect to gate of high-side power N-Channel MOSFETs.
BOOT 2 (Pin 10) and BOOT 1 (Pin 11)
Floating bootstrap supply pins for the upper gate drivers. Connect the bootstrap capacitor between these pins and the
PHASE pin. The bootstrap capacitor provides the charge to turn on the upper MOSFETs. See the Internal Bootstrap Device section under DESCRIPTION for guidance in choosing the appropriate capacitor value.
VCC (Pin 14)
Connect this pin to a +12V bias supply. Place a high quality bypass capacitor from this pin to GND. To prevent forward biasing an internal diode, this pin should be more positive then PVCC during converter start-up.
Description
Operation
Designed for versatility and speed, the HIP6602 two channel, dual MOSFET driver controls both high-side and low-side N-Channel FETs from two externally provided PWM signals.
The upper and lower gates are held low until the driver is initialized. Once the VCC voltage surpasses the VCC Rising Threshold (See Electrical Specifications), the PWM signal takes control of gate transitions. A rising edge on PWM initiates the turn-off of the lower MOSFET (see Timing Diagram). After a short propagation delay [TPDL lower gate begins to fall. Typical fall times [TF
LGATE
provided in the Electrical Specifications section. Adaptive shoot-through circuitry monitors the LGATE voltage and determines the upper gate delay time [TPDH
UGATE
on how quickly the LGATE voltage drops below 1.0V. This prevents both the lower and upper MOSFETs from conducting simultaneously or shoot-through. Once this delay period is complete the upper gate drive begins to rise [TR
] and the upper MOSFET turns on.
UGATE
LGATE
] are
] based
], the
Timing Diagram
PWM
UGATE
LGATE
TPDL
LGATE
TPDH
UGATE
TF
LGATE
5
TR
UGATE
TPDL
UGATE
TPDH
TF
UGATE
LGATE
TR
LGATE
Page 6
HIP6602
A falling transition on PWM indicates the turn-off of the upper MOSFET and the turn-on of the lower MOSFET. A short propagation delay [TPDL before the upper gate begins to fall [TF
] is encountered
UGATE
UGATE
]. Again, the adaptive shoot-through circuitry determines the lower gate delay time, TPDH
. The PHASE voltage is monitored
LGATE
and the lower gate is allowed to rise after PHASE drops below 0.5V. The lower gate then rises [TR
LGATE
], turning
on the lower MOSFET.
Three-State PWM Input
A unique feature of the HIP6602 drivers is the addition of a shutdown window to the PWM input. If the PWM signal enters and remains within the shutdown window for a set holdoff time, the output drivers are disabled and both MOSFET gates are pulled and held low. The shutdown state is removed when the PWM signal moves outside the shutdown window. Otherwise, the PWM rising and falling thresholds outlined in the ELECTRICAL SPECIFICATIONS determine when the lower and upper gates are enabled.
Adaptive Shoot-Through Protection
The drivers incorporate adaptive shoot-through protection to prevent upper and lower MOSFETs from conducting simultaneously and shorting the input supply. This is accomplished by ensuring the falling gate has turned off one MOSFET before the other is allowed to rise.
During turn-off of the lower MOSFET, the LGATE voltage is monitored until it reaches a 1.0V threshold, at which time the UGATE is released to rise. Adaptive shoot-through circuitry monitors the PHASE voltage during UGATE turn-off. Once PHASE has dropped below a threshold of 0.5V, the LGATE is allowed to rise. If the PHASE does not drop below 0.5V within 250ns, LGATE is allowed to rise. This is done to generate the bootstrap refresh signal. PHASE continues to be monitored during the lower gate rise time. If the PHASE voltage exceeds the 0.5V threshold during this period and remains high for longer than 2µs, the LGATE transitions low. This is done to make the lower MOSFET emulate a diode. Both upper and lower gates are then held low until the next rising edge of the PWM signal.
Power-On Reset (POR) Function
During initial start-up, the VCC voltage rise is monitored and gate drives are held low until a typical VCC rising threshold of 9.95V is reached. Once the rising VCC threshold is exceeded, the PWM input signal takes control of the gate drives. If VCC drops below a typical VCC falling threshold of
9.2V during operation, then both gate drives are again held low. This condition persists until the VCC voltage exceeds the VCC rising threshold.
Internal Bootstrap Device
Both drivers feature an internal bootstrap device. Simply adding an external capacitor across the BOOT and PHASE pins completes the bootstrap circuit.
The bootstrap capacitor must have a maximum voltage rating above PVCC + 5V. The bootstrap capacitor can be chosen from the following equation:
Q
C
BOOT
Where Q charge the gate of the upper MOSFET. The ∆V
GATE
------------------------≥
∆V
BOOT
is the amount of gate charge required to fully
GATE
BOOT
term is
defined as the allowable droop in the rail of the upper drive. As an example, suppose a HUF76139 is chosen as the
upper MOSFET. The gate charge, Q
, from the data
GATE
sheet is 65nC for a 10V upper gate drive. We will assume a 200mV droop in drive voltage over the PWM cycle. We find that a bootstrap capacitance of at least 0.325µF is required. The next larger standard value capacitance is 0.33µF.
Gate Drive Voltage Versatility
The HIP6602 provides the user flexibility in choosing the gate drive voltage. Simply applying a voltage from 5V up to 12V on PVCC will set both driver rail voltages.
Power Dissipation
Package power dissipation is mainly a function of the switching frequency and total gate charge of the selected MOSFETs. Calculating the power dissipation in the driver for a desired application is critical to ensuring safe operation. Exceeding the maximum allowable power dissipation level will push the IC beyond the maximum recommended operating junction temperature of 125°C. The maximum allowable IC power dissipation for the 14 lead SOIC package is approximately 1000mW. Improvements in thermal transfer may be gained by increasing the PC board copper area around the HIP6602. Adding a ground pad under the IC to help transfer heat to the outer peripheral of the board will help. Also keeping the leads to the IC as wide as possible and widening this these leads as soon as possible to further enhance heat transfer will also help.
When designing the driver into an application, it is recommended that the following calculation be performed to ensure safe operation at the desired frequency for the selected MOSFETs. The total chip power dissipation is approximated as:
3
P = 1.05 x fSW x V
where f and Q
is the switching frequency of the PWM signal. QU
sw
is the upper and lower gate charge determined by
L
MOSFET selection and any external capacitance added to the gate pins. The I of the driver and is typically 40mW.
The 1.05 term is a correction factor derived from the following characterization. The base circuit for characterizing the drivers for different loading profiles and frequencies is provided. C
and CL are the upper and lower gate load
U
capacitors. Decoupling capacitors [0.15µF] are added to the
_
[ (QU1 + QU2) + (QL1 + QL2)] + I
PVCC
2
VCC product is the quiescent power
DDQ
DDQ
x VCC
6
Page 7
HIP6602
PVCC and VCC pins. The bootstrap capacitor value in the test circuit is 0.01µF.
The power dissipation approximation is a result of power transferred to and from the upper and lower gates. But, the internal bootstrap device also dissipates power on-chip during the refresh cycle. Expressing this power in terms of the upper MOSFET total gate charge is explained below.
The bootstrap device conducts when the lower MOSFET or its body diode conducts and pulls the PHASE node toward GND. While the bootstrap device conducts, a current path is formed that refreshes the bootstrap capacitor. Since the upper gate is driving a MOSFET, the charge removed from the bootstrap capacitor is equivalent to the total gate charge of the MOSFET. Therefore, the refresh power required by the bootstrap capacitor is equivalent to the power used to charge the gate capacitance of the upper MOSFETs.
P
REFRESHfSW
where Q
LOSS
Q
LOSS
V
PVCC
==
fSWQUV
PVCC
is the total charge removed from the bootstrap
capacitors and provided to the upper gate loads. In Figure 1, C
and CL values are the same and frequency
U
is varied from 10kHz to 2MHz. PVCC and VCC are tied together to a +12V supply.
tied together and to a +12V supply. Figures 5 through 7 show the same characterization for PVCC tied to +5V instead of +12V. The gate supply voltage, PVCC, within the HIP6602 sets both upper and lower gate driver supplies at the same 5V level for the last three curves.
Test Circuit
+5V OR +12V
0.15µF
0.15µF
+5V OR +12V
PVCC
VCC
PWM1
PGND
GND
PWM2
0.01µF
BOOT1
HIP6602
UGATE1 PHASE1
LGATE1
0.01µF
BOOT2
UGATE2 PHASE2
2N7002
C
L
2N7002
2N7002
100kΩ
C
U
C
U
+12V
Figure 2 shows the dissipation in the driver with 1nF loading on both gates and each individually. Figure 3 is the same as Figure 2 except the capacitance is increased to 3nF.
The impact of loading on power dissipation is shown in Figure 4. Frequency is held constant while the gate capacitors are varied from 1nF to 5nF. VCC and PVCC are
Typical Performance Curves
1200
CU = C
L
= 5nF
CU = C
L
= 4nF
0
0 500 1000 1500
FREQUENCY (kHz)
C
= CL = 2nF
U
C
= CL = 1nF
U
C
= C
U
= 3nF
L
PVCC = 12V
VCC = 12V
POWER (mW)
1000
800
600
400
200
LGATE2
2N7002
C
L
1200
PVCC = VCC = 12V
POWER (mW)
1000
800
600
400
200
0
C
= CL = 1nF
U
CL = 1nF, CU = 0nF
CU = 1nF, CL = 0nF
0 500 1000 2000
FREQUENCY (kHz)
1500
100kΩ
FIGURE 1. POWER DISSIPATION vs FREQUENCY FIGURE 2. 1nF LOADING PROFILE
7
Page 8
Typical Performance Curves (Continued)
HIP6602
1200
PVCC = VCC = 12V
1000
C
= CL = 3nF
U
800
600
POWER (mW)
400
200
0
0 500 1000
FREQUENCY (kHz)
FIGURE 3. 3nF LOADING PROFILE FIGURE 4. POWER DISSIPATION vs LOADING
800
700
600
500
400
300
POWER (mW)
200
100
PVCC = 5V, VCC = 12V
CU = CL = 3nF
CU = 3nF, CL = 0nF
CL = 3nF, CU = 0nF
CU = CL =1nF
CU = CL = 5nF
CU = CL = 4nF
CU = CL = 2nF
1500
1200
PVCC = VCC = 12V
1000
500kHz
800
600
POWER (mW)
400
200
0
12345
GATE CAPACITANCE (CU = CL), (nF)
350
300
250
200
150
POWER (mW)
100
50
PVCC = 5V, VCC = 12V
CL = 1nF, CU = 0nF
200kHz
100kHz
30kHz
CU = CL = 1nF
CU = 1nF, CL = 0nF
10kHz
0
0 500 1500 2000
1000
FREQUENCY (kHz)
0
0 500 1000 1500 2000
FREQUENCY (kHz)
FIGURE 5. POWER DISSIPATION vs FREQUENCY, PVCC = 5V FIGURE 6. POWER DISSIPATION vs FREQUENCY, PVCC = 5V
600
PVCC = 5V,
VCC = 12V
POWER (mW)
500
2MHz
400
300
200
100
0
1.5MHz
500kHz
GATE CAPACITANCE (C
1MHz
200kHz
= CL), (nF)
U
100kHz
30kHz
54321
FIGURE 7. POWER DISSIPATION vs LOADING, PVCC = 5V
8
Page 9
Small Outline Plastic Packages (SOIC)
HIP6602
N
INDEX AREA
123
-A-
E
-B-
SEATING PLANE
D
A
-C-
0.25(0.010) BM M
H
L
h x 45
o
α
e
B
0.25(0.010) C AM BS
M
NOTES:
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side.
5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch).
10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact.
A1
C
0.10(0.004)
M14.15 (JEDEC MS-012-AB ISSUE C)
14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
INCHES MILLIMETERS
SYMBOL
A 0.0532 0.0688 1.35 1.75 -
A1 0.0040 0.0098 0.10 0.25 -
B 0.013 0.020 0.33 0.51 9 C 0.0075 0.0098 0.19 0.25 ­D 0.3367 0.3444 8.55 8.75 3
E 0.1497 0.1574 3.80 4.00 4
e 0.050 BSC 1.27 BSC ­H 0.2284 0.2440 5.80 6.20 -
h 0.0099 0.0196 0.25 0.50 5
L 0.016 0.050 0.40 1.27 6 N14 147
o
α
0
o
8
o
0
o
8
Rev. 0 12/93
NOTESMIN MAX MIN MAX
-
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil semiconductor products are sold b y de scr ip tion on ly. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with­out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or othe rwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site www.intersil.com
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