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R7710 Schematic ( PDF Datasheet ) - RichPower

Teilenummer R7710
Beschreibung Primary Feedback CC/CV PWM Controller
Hersteller RichPower
Logo RichPower Logo 




Gesamt 11 Seiten
R7710 Datasheet, Funktion
Preliminary
R7710
Primary Feedback CC/CV PWM Controller for Flyback
Converters
General Description
Features
The R7710 is a current mode PWM controller which
includes primary side voltage feedback technology. It
controls the output voltage and current accurately without
shunt regulator and photo coupler on secondary side to
save the part counts and cost.
R7710 is designed especially for low power purpose as
charger of cell phones, PDAs..., and etc. Fruitful
protections, such as UVP, OVP, brownout, current limit
and OTP, minimize the external components. Ultra low
start-up current and operating current of R7710 achieves
the low power consumption in standby mode. The green
mode operation of R7710 also meets the latest efficiency
regulations.
Primary Side CC/CV Control
Current Mode Control
Internal PWM Leading-Edge Blanking
Green-Mode PWM
Cycle-by-Cycle Current Limiting
UVLO at 14V/8V
OVP 27.5V on VDD Pin
Brownout Protection
Output Over Voltage Protection
Built-in Jittering Frequency
Soft Driving for EMI
Programmable Cable Compensation
Internal Over Temperature Protection
Ordering Information
R7710
Package Type
E : SOT-23-6
Operating Temperature Range
G : Green (Halogen Free with Comme-
rcial Standard)
Applications
Switching AC/DC Adaptor and Battery Charger
DVD Open Frame Power Supply
STB
Cell Phone Charger
Networking Power Supply
Note :
Richpower Green products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
For marking information, contact our sales representative
directly or through a Richpower distributor located in your
area, otherwise visit our website for detail.
Pin Configurations
(TOP VIEW)
CS COMP DMAG
65 4
23
GATE GND VDD
SOT-23-6
R7710-02P Nov 2009
1






R7710 Datasheet, Funktion
R7710
Preliminary
Typical Operating Characteristics
Rising Time (TR) vs. Temperature
300
Falling Time (TF) vs. Temperature
160
250
120
200
80
150
40
100
50
-40
0 40 80
Temperature (°C)
120
0
-40
0 40 80
Temperature (°C)
120
VDD OVP Trigger Level vs. Temperature
50
VTH_ON vs. Temperature
20
40 16
30 12
20 8
10 4
0
-40
20
0 40 80
Temperature (°C)
VTH_OFF vs. Temperature
120
0
-40 0
40 80 120
Temperature (°C)
Quiecient Current vs. Temperature
1000
16 880
12 760
8 640
4 520
0
-40 0 40 80 120
Temperature (°C)
400
-40
0 40 80
Temperature (°C)
120
6 R7710-02P Nov 2009

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