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부품번호 | LM5015MHE 기능 |
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기능 | High Voltage Monolithic Two-Switch Forward DC-DC Regulator | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 24 페이지수
December 10, 2007
LM5015
High Voltage Monolithic Two-Switch Forward DC-DC
Regulator
General Description
The LM5015 high voltage switch mode regulator features all
the functions necessary to implement efficient high voltage
Two-Switch Forward and Two-Switch Flyback regulators, us-
ing a minimum of external components. This easy to use
regulator integrates high side and low side 75 Volt N-Channel
MOSFETs with a minimum 1 Amp peak current limit. The
voltage across the MOSFETs employed in the two-switch
topology is clamped to the input voltage, allowing the input
voltage range to approach the rating of the MOSFETs. The
regulator control method is based on current mode control
providing inherent ease of loop compensation and line feed-
forward for superior rejection of input transients.
The operating frequency is set with a single resistor and is
programmable up to 750 kHz. The oscillator can also be syn-
chronized to an external clock. Additional protection features
include cycle-by-cycle current limiting, thermal shutdown, un-
der-voltage lockout and remote shutdown capability. The de-
vice is available in the TSSOP-14EP package featuring an
exposed die attach pad to enhance thermal dissipation.
Features
■ Dual Integrated 75V N-Channel MOSFETs
■ Ultra-wide input voltage range: 4.25V to 75V
■ Integrated high voltage bias regulator
■ Adjustable output voltage
■ 1.5% feedback reference accuracy
■ Current mode control with selectable compensation
■ Wide bandwidth error amplifier
■ Integrated current sensing and limiting
■ 50% maximum duty cycle limit
■ Single resistor oscillator programming
■ Oscillator synchronization capability
■ Programmable soft-start
■ Enable / Under-voltage Lockout (UVLO) pin
■ Thermal shutdown
Package
■ TSSOP-14EP (Exposed Pad)
Typical Application Schematic
© 2007 National Semiconductor Corporation 300346
30034601
www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to AGND
BST to AGND
PVIN to HO, LO, PGND
HO to PGND (Steady State)
LO to PGND (Steady State)
BST to VCC
BST to HO
VCC, EN to AGND
76V
90V
76V
-3V to 76V
-0.3V to 76V
76V
14V
14V
COMP, FB, RT, SS to AGND
PGND to AGND
CFB Sink Current
Maximum Junction Temperature
Storage Temperature
ESD Rating
Human Body Model
Operating Ratings
VIN
Operation Junction Temperature
-0.3V to 7V
-0.3V to +0.3V
10 mA
150°C
−65°C to + 150°C
2 kV
4.25V to 75V
−40°C to + 125°C
Electrical Characteristics Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the
junction temperature (TJ) range of −40°C to + 125°C. Minimum and Maximum limits are guaranteed through test, design, or
statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference
purposes only. VVIN = 48V, RRT = 31.6 kΩ unless otherwise stated. See (Note 3).
Symbol
Parameters
Conditions
Min Typ Max Units
STARTUP REGULATOR
VVCC-REG
VCC Regulator Output
VCC Current Limit
VCC UVLO Threshold
VVCC = 6V
VCC increasing, VIN = VCC, EN=open
6.35
20
3.45
6.85 7.25
25
3.75 4.05
V
mA
V
VCC UVLO Hysteresis
VIN = VCC, EN = open
0.15 V
Bias Current (IIN)
IQ Shutdown Current (IIN)
EN THRESHOLDS
VFB = 1.5V
VEN = 0V
3.1 4.5 mA
110 170 µA
EN Shutdown Threshold
EN Shutdown Hysteresis
VEN increasing
0.25 0.45 0.65
0.1
V
V
EN Standby Threshold
EN Standby Hysteresis
VEN increasing
1.19 1.26 1.3
0.1
V
V
EN Current Source
6 µA
MOSFET CHARACTERSTICS
Low side MOSFET RDS(ON) plus ID = 0.6A
Current Sense Resistance
0.49 0.93 Ω
MOSFET Leakage Current
VLO = 75V
High side MOSFET RDS(ON) ID = 0.6A
MOSFET Leakage Current
VPVIN= 75V, VHO = PGND
Total Gate Charge including both VVCC = 8V
Low and High side MOSFETs
0.05 5
0.45 0.90
0.05 5
9
µA
Ω
µA
nC
Pre-charge Switch ON Voltage ID = 1 mA
including series blocking diode
0.82 V
CURRENT LIMIT
ILIM Cycle by Cycle Current Limit
Cycle by Cycle Current Limit
Delay
1
1.2 1.4
A
130 ns
OSCILLATOR
FSW1
FSW2
VRT-SYNC
Frequency1
Frequency2
SYNC Threshold
SYNC Pulse Width Minimum
RRT = 31.6k
RRT = 15.4k
VRT Increasing
VRT > VRT-SYNC + 0.5V
180 200 220 kHz
365 405 445 kHz
3.2 V
15 ns
www.national.com
4
4페이지 ILIM vs VCC
ILIM vs VCC vs Temperature
Fsw vs RRT
30034609
Fsw vs Temperature
30034610
Fsw vs VCC
30034611
Error Amplifier Gain/Phase
30034612
30034613
7
30034614
www.national.com
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
LM5015MH | High Voltage Monolithic Two-Switch Forward DC-DC Regulator | National Semiconductor |
LM5015MHE | High Voltage Monolithic Two-Switch Forward DC-DC Regulator | National Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |