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PWM Controller. HT7A6005 Datasheet

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PWM Controller. HT7A6005 Datasheet






HT7A6005 Controller. Datasheet pdf. Equivalent




HT7A6005 Controller. Datasheet pdf. Equivalent





Part

HT7A6005

Description

Wide Temperature Range General Purpose Current Mode PWM Controller



Feature


HT7A6005 Low Power, Wide Temperature Ran ge General Purpose Current Mode PWM Con troller Feature • High Performance, Low Cost Current Mode PWM Controller e specially designed for Energy Star 5.0 • Very Low Startup Current (<20μA) and Operating Current • High-Voltage CMOS Process with Excellent ESD protec tion (>3KV) • ±5% Trimmed Oscillato r for Precise Frequency Cont.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7A6005 Datasheet


Holtek Semiconductor HT7A6005

HT7A6005; rol • LEB (Leading-Edge Blanking) on CS Pin • Internal Slope Compensation • Programmable Switching Frequency • Internally Trimmed Reference with UVLO (Under Voltage Lockout) • Cycle -by-Cycle Current Limiting Applications • Switching AC-DC Adaptors • DC- DC Switching Buck/Boost Converters • LED Backlights for LCD/LED TVs Genera l Description The HT7A6005 is a co.


Holtek Semiconductor HT7A6005

ntroller IC that includes the necessary features to implement off-line or DC-DC current mode control schemes with a mi nimal external parts count. Internal ci rcuits include a specially designed Mix ed-Mode/Analog Interface for multifunc .


Holtek Semiconductor HT7A6005

.

Part

HT7A6005

Description

Wide Temperature Range General Purpose Current Mode PWM Controller



Feature


HT7A6005 Low Power, Wide Temperature Ran ge General Purpose Current Mode PWM Con troller Feature • High Performance, Low Cost Current Mode PWM Controller e specially designed for Energy Star 5.0 • Very Low Startup Current (<20μA) and Operating Current • High-Voltage CMOS Process with Excellent ESD protec tion (>3KV) • ±5% Trimmed Oscillato r for Precise Frequency Cont.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7A6005 Datasheet




 HT7A6005
HT7A6005
Low Power, Wide Temperature Range General
Purpose Current Mode PWM Controller
Feature
• High Performance, Low Cost Current Mode PWM
Controller especially designed for Energy Star 5.0
• Very Low Startup Current (<20μA) and Operating
Current
• High-Voltage CMOS Process with Excellent ESD
protection (>3KV)
• ±5% Trimmed Oscillator for Precise Frequency
Control
• LEB (Leading-Edge Blanking) on CS Pin
• Internal Slope Compensation
• Programmable Switching Frequency
• Internally Trimmed Reference with UVLO (Under
Voltage Lockout)
• Cycle-by-Cycle Current Limiting
Applications
• Switching AC-DC Adaptors
• DC-DC Switching Buck/Boost Converters
• LED Backlights for LCD/LED TVs
General Description
The HT7A6005 is a controller IC that includes the
necessary features to implement off-line or DC-DC
current mode control schemes with a minimal external
parts count. Internal circuits include a specially
designed Mixed-Mode/Analog Interface for multi-
function and multi-topology control schemes (DC-DC
Buck/Boost, Off-line AC-DC), a trimmed oscillator
for precise duty-cycle control under voltage lockout
with a start-up current of less than 0.5mA, a wide
temperature range, precise voltage reference, internal
Slope Compensation and Leading-Edge Blanking.
The HT7A6005 features basic system protection
functions such as Cycle-by-Cycle Current Limiting
and Under Voltage Lock-Out (UVLO).
A Multi-Function Pin can be used as a dimming
function for LED driving, and as a primary feedback
control for Primary-Side Feedback AC-DC
applications.
Application Circuits
VIN=24V
0.1mF
VCC
VREF
RT
2.2kW
GD
COMP/FB
GND
CS MF
470mF/50V
10W 1N4148
20W
10kW
46mH
HFB20HJ20C
IRF540
820W
0.22W
33pF
0.22W
470kW
1nF
220pF
40kW
470mF
/63V
2kW
Vo=55V/75W
0.1mF/100V
Rev. 1.10
1 July 17, 2013




 HT7A6005
HT7A6005
Block Diagram
VCC 7
RT 4
UVLO
32V
14V / 8V
VREF
8
Internal Bias
& Vref
Trimmed
OSC
FB Compare
Level = 2.5V
SQ
R
Driver
Stage
VCC
MF 2
COMP/FB 1
CS 3
LEB
350ns
Slope
Compensation
Mixed-Mode/Analog
Interface
OCP Output
OCP Level = 1V
6 GD
5 GND
Pin Assignment
C O M P /F B
MF
CS
RT
18
27
36
45
H T7A 6005
8 S O P -A
VREF
VCC
GD
GND
Pin Description
Pin No. Pin Name
Description
1 COMP/FB Voltage Feedback Pin, Connected to a system voltage feedback point.
Multi-Function Pin. By connecting this pin to different system sensing points, the device
2 MF can be used for different circuit topologies such as Isolation Flyback or Non-Isolation DC-
DC Buck/Boost.
3
CS
A voltage proportional to the inductor current is connected to this input. The PWM
generator uses this voltage to terminate output switching.
4
RT
The oscillator frequency is programmed by connecting a resistor, RT, between this pin and
ground. A maximum frequency of 500kHz is possible.
5 GND Combined control circuitry and power ground.
6 GD Power MOSFET gate driver output.
7 VCC Positive Supply.
8 VREF Temperature-independent voltage reference output.
Absolute Maximum Ratings
Supply Voltage VCC �������������������������������������������������������������������������������������������������������������������������������� -0.3V~30.0V
COMP/FB, RT, CS, MF Pins ��������������������������������������������������������������������������������������������������������������������� -0.3V~5.0V
Junction Temperature ������������������������������������������������������������������������������������������������������������������������������������������ 150°C
Operating Ambient Temperature ��������������������������������������������������������������������������������������������������������������� -40°C~85°C
Storage Temperature Range �������������������������������������������������������������������������������������������������������������������� -65°C~150°C
Package Thermal Resistance (8-Pin SOP) ����������������������������������������������������������������������������������������������������� 160°C/W
ESD Protection:
Human Body Model ���������������������������������������������������������������������������������������������������������������������������������������3kV
Machine Model ��������������������������������������������������������������������������������������������������������������������������������������������200V
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings”
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
Rev. 1.10
2 July 17, 2013




 HT7A6005
HT7A6005
Electrical Characteristics
Unless otherwise stated, this specifications apply for 0°C ≤ Ta ≤ 70°C, VCC=15V, RT=10kW
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
Supply Voltage (VCC Pin)
IST Startup Current
ICC Operating Current
VTL UVLO (Off)
VTH UVLO (On)
Reference Section
VCC=7.7V
VFB=VCS=0V
— 12 30 mA
— 2.0 3.0 mA
7.0 7.6 8.2
V
7.8 8.4 9.0
V
VREF
Output Voltage
∆VREF
Line Regulation
∆VREF
Load Regulation
Current Sensing (CS Pin)
Tj = 25°C, IO = 1mA
12V ≤ VCC ≤ 25V
1mA ≤ IO ≤ 10mA
4.85 5.00 5.15
— 3 20
— 4 25
V
mV
mV
VCS(OFF)
tLEB
Maximum Input Voltage
Leading Edge Blanking Time
Delay to Output
0.9 1.0 1.1
V
— 350 —
ns
— 100 —
ns
Oscillator (RT pin)
fOSC Oscillator Frequency
∆fOSC
∆TA
Tempurature Stability
∆fOSC
∆VREF
Voltage Stability
DMAX
Maximum Duty
Gate Drive Output (GD Pin)
Tj=25°C, RT=10kW
-40°C ~105°C
VCC=10V~25V
47 52 57 kHz
— 5 —%
— 0.2 1.0 %
— 97 — %
VOL Output Low Level
VOH Output High Level
tr Rising Time
tf Falling Time
Voltage Feedback (COMP/FB Pin)
VCC=15V, Isink=20mA
VCC=15V, Isource=20mA
Tj=25°C, Load Capacitance=1nF
Tj=25°C, Load Capacitance=1nF
9
—1 V
—— V
50 150 ns
50 150 ns
VCOMP
VREFA
ISINKA
ISOURCEA
VOHA
VOLA
AVO
Open Loop Voltage
Reference Voltage
Output Sink Current
Output Source Current
VCOMP/FB High Voltage
VCOMP/FB Low Voltage
DC Gain
COMP/FB pin open
VFB/PDM=2.5V
VFB=2.7V, VFB/PDM=1.1V
VFB=2.3V, VFB/PDM=4.8V
VFB=2.3V, RL=15kW to GND
VFB=2.7V, RL=15kW to Vref
—5—
2.42 2.50 2.58
2 7—
-0.5 -1.0
4.8 5.0
— 0.8 1.1
— 150 —
V
V
mA
mA
V
V
dB
Note: These Parameters, although guaranteed, are not 100% tested in production.
Rev. 1.10
3 July 17, 2013



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