PWM Controller. R7710 Datasheet

R7710 Controller. Datasheet pdf. Equivalent

R7710 Datasheet
Recommendation R7710 Datasheet
Part R7710
Description Primary Feedback CC/CV PWM Controller
Feature R7710; Preliminary R7710 Primary Feedback CC/CV PWM Controller for Flyback Converters General Descriptio.
Manufacture RichPower
Datasheet
Download R7710 Datasheet




RichPower R7710
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



RichPower R7710
R7710
Functional Pin Description
Preliminary
Pin No.
1
2
3
4
5
6
Pin Name
Pin Function
GATE
Gate driver output to drive the external MOSFET.
GND
Ground.
VDD
Power supply pin.
D MA G
Output voltage detection.
COMP Compensation pin of control loop.
CS Sense of the primary current.
Typical Application Circuit
L
N
3 VDD
4
DMAG
5
COMP
R7710
1
GATE
2
GND
6
CS
VO+
VO-
2 R7710-02P Nov 2009



RichPower R7710
Function Block Diagram
Preliminary
R7710
VDD
DMAX Detect
VSENSE Low
Brown Out
>VCOMP
DMAG
Clamp
Circuit
OTP&OCP
OVP(VOUT)
Shutdown
Logic
OVP
+
- 27.5V
Timer
Frequency
Jitter & Modulation
Disable
Bias
&
Bandgap
POR
+
- 14V
UVLO /8V
CC Control
TOFF
K*VIN
S/H
VSENSE
2.5V >
-
gm
+
-
+
-
+
X3
LEB
SQ
R QN
Soft
Driver
Minimum Ton
K*VIN
GATE
GND
COMP
CS
R7710-02P Nov 2009
3







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