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PDF JTMT8823 Data sheet ( Hoja de datos )
| Número de pieza | JTMT8823 | |
| Descripción | System Power PWM Controller | |
| Fabricantes | JIATAIMU | |
| Logotipo |  |
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JTMT8823
System Power PWM Controller with Economy Standby Mode
Features
Simplified Application Circuit
Wide Input voltage Range from 5.5V to 25V
VIN
Provide 5 Independent Outputs with ±1.0% Accu- 5.5V~25V
EN1
EN2
racy Over-Temperature
VLDO5
- PWM1 Controller with Adjustable (2V to 5.5V) Out- VOUT1
put
- PWM2 Controller with Adjustable (2V to 5.5V) Out-
put
Q1
L1
Q2
LDO5 LDO3
PWM1 PWM2
Charge Pump
- 100mA Low Dropout Regulator (LDO5) with Fixed
5V Output
C1 D2
D3 C3
Q3
L2
VLDO3
VOUT2
Q4
D4 VCP
- 100mA Low Dropout Regulator (LDO3) with Fixed
3.3V Output
D1 C2
- 250kHz Clock Signal for 15V Charge Pump (Used General Description
C4
PWM1 as Its Power Supply)
The JTMT8823 integrates dual step-down, constant-on-
Excellent Line/Load Regulations about±1.5% over time, synchronous PWM controllers (that drives dual N-
temperature range at PWM Channels
channel MOSFETs for each channel) and two low drop-
Low Consumption in Standby Mode
out regulators as well as various protections into a chip.
2Cells Input Battery Support
The PWM controllers step down high voltage of a battery
Built in POR Control Scheme Implemented
to generate low-voltage for NB applications. The output
Constant On-Time Control Scheme
of PWM1 and PWM2 can be adjusted from 2V to 5.5V by
Built in Soft Start for PWM Outputs and Soft Stop setting a resistive voltage-divider from VOUTx to GND.
for PWM Outputs and LDO Outputs
The linear regulators provide 5V and 3.3V output for
Integrated Bootstrap Forward P-CH MOSFET
standby power supply. The linear regulators provide up
High Efficiency over Light to Full Load Range
to 100mA output current. When the PWMx output voltage
(PWMs)
is higher than LDOx bypass threshold, the related LDOx
Built in Power Good Indicators (PWMs)
regulator is shut off and its output is connected to VOUTx
60% Under-Voltage and 115% Over-Voltage Protec- by internal switchover MOSFET. It can save power
tions (PWM)
dissipation. The charge pump circuit with 250kHz clock
Adjustable Current-Limit Protection (PWMs)
driver uses VOUT1 as its power supply to generate ap-
- Using Sense Low-Side MOSFET’s RDS(ON)
Over-Temperature Protection
proximately 15V DC voltage.
The JTMT8823 provides excellent transient response
3mmx3mm Thin QFN-20 (TQFN3x3-20) package and accurate DC output voltage in either PFM or PWM
Lead Free and Green Device Available (RoHS
Mode. In Pulse-Frequency Mode (PFM), the JTMT8823
Compliant)
provides very high efficiency over light to heavy loads
with loading-modulated switching frequencies. The
Forced-PWM Mode works nearly at constant frequency
for low-noise requirements. The unique ultrasonic
mode maintains the switching frequency above 25kHz,
which eliminates noise in audio application.
JIATAIMU reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright JIATAIMU Electronics Corp.
Rev. P.1 - Nov., 2013
1
www.jtmic.com
1 page  
JTMT8823
Thermal Characteristics (Note 2)
Symbol
θJA
θJC
Parameter
Thermal Resistance -Junction to Ambient
Thermal Resistance -Junction to Case
Typical Value
65
10
Unit
o
C/W
Note 2:JA andJC are measured with the component mounted on a high effective the thermal conductivity test board in free air. The
thermal pad of package is soldered directly on the PCB.
Recommended Operating Conditions
Symbol
Parameter
VIN PWM1/2 Converter Input Voltage
VOUT1 PWM1 Converter Output Voltage
VOUT2 PWM2 Converter Output Voltage
CIN PWM1/2 Converter Input Capacitor (MLCC)
CLDO LDO Output Capacitor (MLCC)
TA Ambient Temperature
TJ Junction Temperature
Range
5.5 ~ 25
2 ~ 5.5
2 ~ 5.5
10 ~
1.0~
-40 ~ 85
-40 ~ 125
Unit
V
V
V
F
F
oC
oC
Electrical Characteristics
Refer to the typical application circuits. These specifications apply over V IN=12V and TA= -40 ~ 85oC, unless otherwise
specified. Typical values are at T A=25oC.
Symbol
Parameter
Test Conditions
APW8823
Min Typ Max
Unit
INPUT SUPPLY POWER
Supply current1, BYP=0V,
IVN VIN Supply Current
EN1=EN2=5V, VFB1 = VFB2 = 2.05V
Supply current2, BYP=5V,
EN1=EN2=5V, VFB1 = VFB2 = 2.05V
Standby current1, BYP=0V,
EN1=EN2=0V (For APW8823A/D)
Standby current2, BYP=0V,
EN1=EN2=0V (For APW8823B/C)
UNDER VOLTAGE LOCK OUT PROTECTION (UVLO)
- 0.15 -
- 10 -
- 20 -
- 40 -
mA
A
LDO5 UVLO threshold
LDO3 UVLO threshold
VIN POR threshold
Rising Edge, PWM1/2 enable
Hysteresis
Rising Edge
Hysteresis
Rising threshold1, LDO3 enable
(APW8823A/D)
Rising threshold2, LDO3 & LDO5
enable (For APW8823B/C)
Rising threshold2, LDO5 enable
(APW8823A/D)
Falling threshold2, PWMx shutdown
with soft stop.
When PWMx soft stop is complete,
LDO5 will begin to shutdown
Falling threshold1, LDOx shutdown
with soft stop
4.2
-
2.9
-
-
-
-
-
-
4.3 4.4
0.1 -
3.0 3.1
0.1 -
3.8 -
3.8 -
5.1 -
5.0 -
3.7 -
V
V
V
V
V
V
V
V
V
Copyright JIATAIMU Electronics Corp.
Rev. P.1 - Nov., 2013
5
www.jtmic.com
5 Page 
JTMT8823
Typical Application Circuit
For JTMT882A/B/C/D/H
VIN : 5.5V to 25V
CLDO5
F
CIN1
10F
VOUT1
5V/7A
COUT1
330F/10V
9m ohm
RTOP1
30k
Q1
APM4810
LOUT1
4.7H
Q2
APM4810
RPOK
200k
CBOOT1
0.1F
RBOOT1
0
LDO5 VIN LDO3
POK
BOOT1
UGATE1
BOOT2
UGATE2
RBOOT2
0
PHASE1 PHASE2
LGATE1 LGATE2
GND
GND
BYP
CBOOT2
0.22F
CLDO3
F
Q3
APM4810
LOUT2
2.2H
CIN2
10F
VOUT2
3.3V/11A
Q4
APM4810
COUT2
330F/6.3Vx2
4m ohm
RTOP2
13k
RGND1
20k
RILIM1
40k
ON
OFF
FB1
ILIM1
FB2
ILIM2
EN1
EN2
GND
GND
VCLK
CCP1
100nF
D1
D2
CCP2
100nF
RILIM2
40k
ON
OFF
CCP3
100nF
D3 D4
CCP4
1F
RGND2
20k
VCP
15V
Copyright JIATAIMU Electronics Corp.
Rev. P.1 - Nov., 2013
11
www.jtmic.com
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet JTMT8823.PDF ] | |
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